Problem

Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String { ...
XCTAssertTrue(changeBase(x: 8, base: 3) == "22")
XCTAssertTrue(changeBase(x: 9, base: 3) == "100")
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010")
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000")
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000")
XCTAssertTrue(changeBase(x: 7, base: 2) == "111")
XCTAssertTrue(changeBase(x: 2, base: 3) == "2")
XCTAssertTrue(changeBase(x: 3, base: 4) == "3")
XCTAssertTrue(changeBase(x: 4, base: 5) == "4")
XCTAssertTrue(changeBase(x: 5, base: 6) == "5")
XCTAssertTrue(changeBase(x: 6, base: 7) == "6")
XCTAssertTrue(changeBase(x: 7, base: 8) == "7")
  • 0.78 Compiled
  • 0.78 Passed

Solutions

func changeBase(x: Int, base: Int) -> String {
  var x = x
  var base = base
  var result = ""
  while x > 0 {
    result = String(x % base) + result
    x = x / base
  }
  return result
}

func changeBase(x: String, base: Int) -> Int {
  var x = x
  var base = base
  var result = 0
  var power = 0
  while x.count > 0 {
    let digit = Int(String(x.last!))!
    result += digit * pow(base, power)
    power += 1
    x = String(x.dropLast())
  }
  return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
  var x = x
  var base = base
  var result = ""
  while x > 0 {
    result = String(x % base) + result
    x = x / base
  }
  return result
}

// Change base of input string x to base.
// return integer representation after the conversion.
// base numbers are less than 10.
// changeBase(x: "22", base: 3) == 8
// changeBase(x: "1000", base: 2) == 8
// changeBase(x: "111", base: 2) == 7
func changeBase(x: String, base: Int) -> Int {
  var x = x
  var base = base
  var result = 0
  var power = 0
  while x.count > 0 {
    let digit = Int(String(x.last!))!
    result += digit * pow(base, power)
    power += 1
    x = String(x.dropLast())
  }
  return result
}
<|file_separator|>
var base = base // variable 'base' was never mutated; consider changing to 'let' constant
result += digit * pow(base, power) // cannot convert value of type 'Decimal' to expected argument type 'Int'
result += digit * pow(base, power) // cannot convert value of type 'Int' to expected argument type 'Decimal'

func changeBase(x: Int, base: Int) -> String {
  var x = x
  var base = base
  var result = ""
  while x > 0 {
    let remainder = x % base
    x = x / base
    if remainder < 10 {
      result = String(remainder) + result
    } else {
      result = String(Character(UnicodeScalar(remainder + 55)!) ) + result
    }
  }
  return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
  var x = x
  var base = base
  var result = ""
  while x > 0 {
    let remainder = x % base
    x = x / base
    if remainder < 10 {
      result = String(remainder) + result
    } else {
      result = String(Character(UnicodeScalar(remainder + 55)!) ) + result
    }
  }
  return result
}
<|file_separator|>
var base = base // variable 'base' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
  var x = x
  var base = base
  var result = ""
  
  while x > 0 {
    let remainder = x % base
    result = String(remainder) + result
    x = x / base
  }
  
  return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
  var x = x
  var base = base
  var result = ""
  
  while x > 0 {
    let remainder = x % base
    result = String(remainder) + result
    x = x / base
  }
  
  return result
}
<|file_separator|>
var base = base // variable 'base' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var base = base
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x = x / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var base = base
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x = x / base
    }
    return result
}
<|file_separator|>
var base = base // variable 'base' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x = x / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x = x / base
    }
    return result
}

// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x = x / base
    }
    return result
}
<|file_separator|>

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var base = base
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x = x / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var base = base
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x = x / base
    }
    return result
}
<|file_separator|>
var base = base // variable 'base' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        let remainder = x % base
        x = x / base
        result = String(remainder) + result
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        let remainder = x % base
        x = x / base
        result = String(remainder) + result
    }
    return result
}
<|file_separator|>

func changeBase(x: Int, base: Int) -> String {
  var x = x
  var base = base
  var result = ""
  while x > 0 {
    let remainder = x % base
    result = String(remainder) + result
    x = x / base
  }
  return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
  var x = x
  var base = base
  var result = ""
  while x > 0 {
    let remainder = x % base
    result = String(remainder) + result
    x = x / base
  }
  return result
}
<|file_separator|>
var base = base // variable 'base' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var base = base
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x = x / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var base = base
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x = x / base
    }
    return result
}
<|file_separator|>
var base = base // variable 'base' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
  var x = x
  var base = base
  var result = ""
  while x > 0 {
    let remainder = x % base
    result = String(remainder) + result
    x = x / base
  }
  return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
  var x = x
  var base = base
  var result = ""
  while x > 0 {
    let remainder = x % base
    result = String(remainder) + result
    x = x / base
  }
  return result
}
<|file_separator|>
var base = base // variable 'base' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    
    while number > 0 {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    }
    
    return result
}
<bos><start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<end_of_turn>
<start_of_turn>model
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    
    while number > 0 {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    
    while number > 0 {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    }
    
    return result
}
<bos><start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<end_of_turn>
<start_of_turn>model
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    
    while number > 0 {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    
    while number > 0 {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    }
    
    return result
}
<bos><start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<end_of_turn>
<start_of_turn>model
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    
    while number > 0 {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    
    while number > 0 {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    }
    
    return result
}
<bos><start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<end_of_turn>
<start_of_turn>model
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    
    while number > 0 {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    
    while number > 0 {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    }
    
    return result
}
<bos><start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<end_of_turn>
<start_of_turn>model
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    
    while number > 0 {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    
    while number > 0 {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    }
    
    return result
}
<bos><start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<end_of_turn>
<start_of_turn>model
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    
    while number > 0 {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    
    while number > 0 {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    }
    
    return result
}
<bos><start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<end_of_turn>
<start_of_turn>model
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    
    while number > 0 {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    
    while number > 0 {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    }
    
    return result
}
<bos><start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<end_of_turn>
<start_of_turn>model
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    
    while number > 0 {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    
    while number > 0 {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    }
    
    return result
}
<bos><start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<end_of_turn>
<start_of_turn>model
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    
    while number > 0 {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    
    while number > 0 {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    }
    
    return result
}
<bos><start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<end_of_turn>
<start_of_turn>model
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    
    while number > 0 {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = "\(x % base)" + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = "\(x % base)" + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = "\(remainder % base)" + result
        remainder /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = "\(remainder % base)" + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
```

func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = "\(x % base)" + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = "\(x % base)" + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    var base = base
    while x > 0 {
        result = "\(x % base)" + result
        x = x / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    var base = base
    while x > 0 {
        result = "\(x % base)" + result
        x = x / base
    }
    return result
}
```
var base = base // variable 'base' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x = x / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x = x / base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = "\(x % base)" + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = "\(x % base)" + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = "\(num % base)" + result
        num /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = "\(num % base)" + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = "\(x % base)" + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = "\(x % base)" + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder = remainder / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder = remainder / base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = "\(remainder % base)" + result
        remainder /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = "\(remainder % base)" + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    // TODO: Write your code here
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    // TODO: Write your code here
}
```
} // missing return in global function expected to return 'String'

func changeBase(x: Int, base: Int) -> String {
    // your code here
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    // your code here
}
```
} // missing return in global function expected to return 'String'

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var n = x
    while n > 0 {
        result = String(n % base) + result
        n /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var n = x
    while n > 0 {
        result = String(n % base) + result
        n /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    // TODO: Write your code here
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    // TODO: Write your code here
}
```
} // missing return in global function expected to return 'String'

func changeBase(x: Int, base: Int) -> String {
    // TODO: Write your code here
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    // TODO: Write your code here
}
```
} // missing return in global function expected to return 'String'

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    // your code here
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    // your code here
}
```
} // missing return in global function expected to return 'String'

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    // your code here
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    // your code here
}
```
} // missing return in global function expected to return 'String'

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        let digit = num % base
        result = String(digit) + result
        num /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        let digit = num % base
        result = String(digit) + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        let remainderInt = remainder % base
        result = "\(remainderInt)" + result
        remainder = remainder / base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        let remainderInt = remainder % base
        result = "\(remainderInt)" + result
        remainder = remainder / base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        let remainderInt = remainder % base
        result = "\(remainderInt)" + result
        remainder = remainder / base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        let remainderInt = remainder % base
        result = "\(remainderInt)" + result
        remainder = remainder / base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    guard x >= 0 else {
        return "Invalid input"
    }
    
    guard base >= 2 && base <= 36 else {
        return "Invalid base"
    }
    
    var result = ""
    var x = x
    
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x /= base
    }
    
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    guard x >= 0 else {
        return "Invalid input"
    }
    
    guard base >= 2 && base <= 36 else {
        return "Invalid base"
    }
    
    var result = ""
    var x = x
    
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = "\(num % base)" + result
        num /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = "\(num % base)" + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        let remainder = x % base
        result = "\(remainder)" + result
        x /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        let remainder = x % base
        result = "\(remainder)" + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = "\(num % base)" + result
        num /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = "\(num % base)" + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var currentNumber = x
    while currentNumber > 0 {
        let remainder = currentNumber % base
        result = String(remainder) + result
        currentNumber /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var currentNumber = x
    while currentNumber > 0 {
        let remainder = currentNumber % base
        result = String(remainder) + result
        currentNumber /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var currentNumber = x
    
    while currentNumber > 0 {
        let remainder = currentNumber % base
        result = "\(remainder)" + result
        currentNumber /= base
    }
    
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var currentNumber = x
    
    while currentNumber > 0 {
        let remainder = currentNumber % base
        result = "\(remainder)" + result
        currentNumber /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    
    while remainder > 0 {
        let remainderBase = remainder % base
        result = "\(remainderBase)" + result
        remainder /= base
    }
    
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    
    while remainder > 0 {
        let remainderBase = remainder % base
        result = "\(remainderBase)" + result
        remainder /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    guard base > 1 else {
        return "Base must be greater than 1"
    }
    
    var result = ""
    var remainder = x
    
    while remainder > 0 {
        let digit = remainder % base
        result = String(digit) + result
        remainder /= base
    }
    
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    guard base > 1 else {
        return "Base must be greater than 1"
    }
    
    var result = ""
    var remainder = x
    
    while remainder > 0 {
        let digit = remainder % base
        result = String(digit) + result
        remainder /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var quotient = x
    while quotient > 0 {
        let remainder = quotient % base
        result = String(remainder) + result
        quotient /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var quotient = x
    while quotient > 0 {
        let remainder = quotient % base
        result = String(remainder) + result
        quotient /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x /= base
    }
    
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x /= base
    }
    
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var n = x
    while n > 0 {
        let remainder = n % base
        result = String(remainder) + result
        n /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var n = x
    while n > 0 {
        let remainder = n % base
        result = String(remainder) + result
        n /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x /= base
    }
    
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x /= base
    }
    
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    let digits = "0123456789"
    var result = ""
    var number = x
    while number > 0 {
        result = digits[number % base] + result
        number /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    let digits = "0123456789"
    var result = ""
    var number = x
    while number > 0 {
        result = digits[number % base] + result
        number /= base
    }
    return result
}
```
result = digits[number % base] + result // no exact matches in call to subscript

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    let digits = "0123456789"
    
    while x > 0 {
        result = digits[x % base] + result
        x /= base
    }
    
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    let digits = "0123456789"
    
    while x > 0 {
        result = digits[x % base] + result
        x /= base
    }
    
    return result
}
```
result = digits[x % base] + result // no exact matches in call to subscript

func changeBase(x: Int, base: Int) -> String {
    let digits = "0123456789"
    var result = ""
    var number = x
    while number > 0 {
        result = digits[number % base] + result
        number /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    let digits = "0123456789"
    var result = ""
    var number = x
    while number > 0 {
        result = digits[number % base] + result
        number /= base
    }
    return result
}
```
result = digits[number % base] + result // no exact matches in call to subscript

func changeBase(x: Int, base: Int) -> String {
    let digits = "0123456789"
    var result = ""
    var number = x
    while number > 0 {
        result = digits[number % base] + result
        number /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    let digits = "0123456789"
    var result = ""
    var number = x
    while number > 0 {
        result = digits[number % base] + result
        number /= base
    }
    return result
}
```
result = digits[number % base] + result // no exact matches in call to subscript

func changeBase(x: Int, base: Int) -> String {
    let digits = "0123456789"
    var result = ""
    var number = x
    while number > 0 {
        result = digits[number % base] + result
        number /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    let digits = "0123456789"
    var result = ""
    var number = x
    while number > 0 {
        result = digits[number % base] + result
        number /= base
    }
    return result
}
```
result = digits[number % base] + result // no exact matches in call to subscript

func changeBase(x: Int, base: Int) -> String {
    let digits = "0123456789"
    var result = ""
    var number = x
    while number > 0 {
        result = digits[number % base] + result
        number /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    let digits = "0123456789"
    var result = ""
    var number = x
    while number > 0 {
        result = digits[number % base] + result
        number /= base
    }
    return result
}
```
result = digits[number % base] + result // no exact matches in call to subscript

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    let digits = "0123456789"
    
    while x > 0 {
        result = digits[x % base] + result
        x /= base
    }
    
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    let digits = "0123456789"
    
    while x > 0 {
        result = digits[x % base] + result
        x /= base
    }
    
    return result
}
```
result = digits[x % base] + result // no exact matches in call to subscript

func changeBase(x: Int, base: Int) -> String {
    let digits = "0123456789"
    var result = ""
    var number = x
    while number > 0 {
        result = digits[number % base] + result
        number /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    let digits = "0123456789"
    var result = ""
    var number = x
    while number > 0 {
        result = digits[number % base] + result
        number /= base
    }
    return result
}
```
result = digits[number % base] + result // no exact matches in call to subscript

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    let digits = "0123456789"
    
    while x > 0 {
        result = digits[x % base] + result
        x /= base
    }
    
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    let digits = "0123456789"
    
    while x > 0 {
        result = digits[x % base] + result
        x /= base
    }
    
    return result
}
```
result = digits[x % base] + result // no exact matches in call to subscript

func changeBase(x: Int, base: Int) -> String {
    let digits = "0123456789"
    var result = ""
    var number = x
    while number > 0 {
        result = digits[number % base] + result
        number /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    let digits = "0123456789"
    var result = ""
    var number = x
    while number > 0 {
        result = digits[number % base] + result
        number /= base
    }
    return result
}
```
result = digits[number % base] + result // no exact matches in call to subscript

import Foundation

func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}
```swift
import Foundation

/* 
 Function to multiply two matrices represented as 2D arrays of Doubles.
 Returns a new matrix that is the product of `lhs` and `rhs`, or `nil` if the matrices cannot be multiplied.
 */
func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

/*
 Change numerical base of input number x to base.
 return string representation after the conversion.
 base numbers are less than 10.
 changeBase(x: 8, base: 3) == "22"
 changeBase(x: 8, base: 2) == "1000"
 changeBase(x: 7, base: 2) == "111"
 */
func changeBase(x: Int, base: Int) -> String {
    
    
    
    
    
    var result = [
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

import Foundation

func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}
```swift
import Foundation

/* 
 Function to multiply two matrices represented as 2D arrays of Doubles.
 Returns a new matrix that is the product of `lhs` and `rhs`, or `nil` if the matrices cannot be multiplied.
 */
func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

/*
 Change numerical base of input number x to base.
 return string representation after the conversion.
 base numbers are less than 10.
 changeBase(x: 8, base: 3) == "22"
 changeBase(x: 8, base: 2) == "1000"
 changeBase(x: 7, base: 2) == "111"
 */
func changeBase(x: Int, base: Int) -> String {
    
    
    
    
    var result = [[Double](repep = [[Double]
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

import Foundation

func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}
```swift
import Foundation

/* 
 Function to multiply two matrices represented as 2D arrays of Doubles.
 Returns a new matrix that is the product of `lhs` and `rhs`, or `nil` if the matrices cannot be multiplied.
 */
func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

/*
 Change numerical base of input number x to base.
 return string representation after the conversion.
 base numbers are less than 10.
 changeBase(x: 8, base: 3) == "22"
 changeBase(x: 8, base: 2) == "1000"
 changeBase(x: 7, base: 2) == "111"
 */
func changeBase(x: Int, base: Int) -> String {
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

import Foundation

func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}
```swift
import Foundation

/* 
 Function to multiply two matrices represented as 2D arrays of Doubles.
 Returns a new matrix that is the product of `lhs` and `rhs`, or `nil` if the matrices cannot be multiplied.
 */
func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

/*
 Change numerical base of input number x to base.
 return string representation after the conversion.
 base numbers are less than 10.
 changeBase(x: 8, base: 3) == "22"
 changeBase(x: 8, base: 2) == "1000"
 changeBase(x: 7, base: 2) == "111"
 */
func changeBase(x: Int, base: Int) -> String {
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

import Foundation

func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}
```swift
import Foundation

/* 
 Function to multiply two matrices represented as 2D arrays of Doubles.
 Returns a new matrix that is the product of `lhs` and `rhs`, or `nil` if the matrices cannot be multiplied.
 */
func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

/*
 Change numerical base of input number x to base.
 return string representation after the conversion.
 base numbers are less than 10.
 changeBase(x: 8, base: 3) == "22"
 changeBase(x: 8, base: 2) == "1000"
 changeBase(x: 7, base: 2) == "111"
 */
func changeBase(x: Int, base: Int) -> String {
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

import Foundation

func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}
```swift
import Foundation

/* 
 Function to multiply two matrices represented as 2D arrays of Doubles.
 Returns a new matrix that is the product of `lhs` and `rhs`, or `nil` if the matrices cannot be multiplied.
 */
func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

/*
 Change numerical base of input number x to base.
 return string representation after the conversion.
 base numbers are less than 10.
 changeBase(x: 8, base: 3) == "22"
 changeBase(x: 8, base: 2) == "1000"
 changeBase(x: 7, base: 2) == "111"
 */
func changeBase(x: Int, base: Int) -> String {
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

import Foundation

func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}
```swift
import Foundation

/* 
 Function to multiply two matrices represented as 2D arrays of Doubles.
 Returns a new matrix that is the product of `lhs` and `rhs`, or `nil` if the matrices cannot be multiplied.
 */
func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

/*
 Change numerical base of input number x to base.
 return string representation after the conversion.
 base numbers are less than 10.
 changeBase(x: 8, base: 3) == "22"
 changeBase(x: 8, base: 2) == "1000"
 changeBase(x: 7, base: 2) == "111"
 */
func changeBase(x: Int, base: Int) -> String {
    
    
    
    
    
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

import Foundation

func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}
```swift
import Foundation

/* 
 Function to multiply two matrices represented as 2D arrays of Doubles.
 Returns a new matrix that is the product of `lhs` and `rhs`, or `nil` if the matrices cannot be multiplied.
 */
func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

/*
 Change numerical base of input number x to base.
 return string representation after the conversion.
 base numbers are less than 10.
 changeBase(x: 8, base: 3) == "22"
 changeBase(x: 8, base: 2) == "1000"
 changeBase(x: 7, base: 2) == "111"
 */
func changeBase(x: Int, base: Int) -> String {
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

import Foundation

func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}
```swift
import Foundation

/* 
 Function to multiply two matrices represented as 2D arrays of Doubles.
 Returns a new matrix that is the product of `lhs` and `rhs`, or `nil` if the matrices cannot be multiplied.
 */
func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

/*
 Change numerical base of input number x to base.
 return string representation after the conversion.
 base numbers are less than 10.
 changeBase(x: 8, base: 3) == "22"
 changeBase(x: 8, base: 2) == "1000"
 changeBase(x: 7, base: 2) == "111"
 */
func changeBase(x: Int, base: Int) -> String {
    
    
    
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

import Foundation

func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}
```swift
import Foundation

/* 
 Function to multiply two matrices represented as 2D arrays of Doubles.
 Returns a new matrix that is the product of `lhs` and `rhs`, or `nil` if the matrices cannot be multiplied.
 */
func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

/*
 Change numerical base of input number x to base.
 return string representation after the conversion.
 base numbers are less than 10.
 changeBase(x: 8, base: 3) == "22"
 changeBase(x: 8, base: 2) == "1000"
 changeBase(x: 7, base: 2) == "111"
 */
func changeBase(x: Int, base: Int) -> String {
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
```
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {


"Error: "Invalid input number or base should be less than 10"
    // Check if x must be less than 10"
    // base is greater than 10"
    // if x must be equal to
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
```
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
```
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    // Convert number toBinary representation
    if base 10 to other base
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

func changeBase(x: Int, base: Int) -> String {
    let chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
    var result = ""
    var num = x
    var remainder: Int
    var quotient: Int
    
    // Convert to base
    while num > 0 {
        remainder = num % base
        quotient = num / base
        result = String(chars[remainder]) + result
        num = quotient
    }
    
    return result
}
<|begin▁of▁sentence|>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    let chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
    var result = ""
    var num = x
    var remainder: Int
    var quotient: Int
    
    // Convert to base
    while num > 0 {
        remainder = num % base
        quotient = num / base
        result = String(chars[remainder]) + result
        num = quotient
    }
    
    return result
}

print(changeBase(x: 8, base: 3)) // "22"
print(changeBase(x: 8, base: 2)) // "1000"
print(changeBase(x: 7, base: 2)) // "111"
```
result = String(chars[remainder]) + result // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.

func changeBase(x: Int, base: Int) -> String {
    let chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
    var result = ""
    var num = x
    var baseNum = base
    var isNegative = false
    
    if x < 0 {
        isNegative = true
        num = -x
    }
    
    var quotient, remainder: Int
    while num > 0 {
        quotient = num / baseNum
        remainder = num - quotient * baseNum
        result.insert(chars[remainder], at: 0)
        num = quotient
    }
    
    if isNegative {
        result.insert("-", at: 0)
    }
    
    return result.reversed()
}
<|begin▁of▁sentence|>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    let chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
    var result = ""
    var num = x
    var baseNum = base
    var isNegative = false
    
    if x < 0 {
        isNegative = true
        num = -x
    }
    
    var quotient, remainder: Int
    while num > 0 {
        quotient = num / baseNum
        remainder = num - quotient * baseNum
        result.insert(chars[remainder], at: 0)
        num = quotient
    }
    
    if isNegative {
        result.insert("-", at: 0)
    }
    
    return result.reversed()
}
```
result.insert(chars[remainder], at: 0) // cannot convert value of type 'Int' to expected argument type 'String.Index'
result.insert("-", at: 0) // cannot convert value of type 'Int' to expected argument type 'String.Index'
return result.reversed() // no 'reversed' candidates produce the expected contextual result type 'String'

func changeBase(x: Int, base: Int) -> String {
    let chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
    var result = ""
    var num = x
    var baseNum = base
    var isNegative = false
    
    if x < 0 {
        isNegative = true
        num = -x
    }
    
    loop {
        let remainder = num % baseNum
        num /= baseNum
        result = String(chars[remainder]) + result
        
        if num == 0 {
            break
        }
    }
    
    return (isNegative ? "-" : "") + result
}
<|begin▁of▁sentence|>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    let chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
    var result = ""
    var num = x
    var baseNum = base
    var isNegative = false
    
    if x < 0 {
        isNegative = true
        num = -x
    }
    
    loop {
        let remainder = num % baseNum
        num /= baseNum
        result = String(chars[remainder]) + result
        
        if num == 0 {
            break
        }
    }
    
    return (isNegative ? "-" : "") + result
}
```
loop { // cannot find 'loop' in scope

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    var baseNum = base
    var remainderArray: [Int] = []
    
    // Convert to base
    while num > 0 {
        let remainder = num % baseNum
        remainderArray.append(remainder)
        num /= baseNum
    }
    
    // Convert to base string
    while !remainderArray.isEmpty {
        let remainder = remainderArray.popLast()
        result += String(remainder)
    }
    
    return result
}
<|begin▁of▁sentence|>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    var baseNum = base
    var remainderArray: [Int] = []
    
    // Convert to base
    while num > 0 {
        let remainder = num % baseNum
        remainderArray.append(remainder)
        num /= baseNum
    }
    
    // Convert to base string
    while !remainderArray.isEmpty {
        let remainder = remainderArray.popLast()
        result += String(remainder)
    }
    
    return result
}

print(changeBase(x: 8, base: 3)) // "22"
print(changeBase(x: 8, base: 2)) // "1000"
print(changeBase(x: 7, base: 2)) // "111"
```
result += String(remainder) // no exact matches in call to initializer

func changeBase(x: Int, base: Int) -> String {
    let chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
    var result = ""
    var num = x
    var baseNum = base
    var negative = false
    
    if x < 0 {
        negative = true
        num = -x
    }
    
    loop {
        let remainder = num % baseNum
        num /= baseNum
        result = String(chars[remainder]) + result
        if num == 0 { break }
    }
    
    if negative {
        result = "-" + result
    }
    
    return result
}
<|begin▁of▁sentence|>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    let chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
    var result = ""
    var num = x
    var baseNum = base
    var negative = false
    
    if x < 0 {
        negative = true
        num = -x
    }
    
    loop {
        let remainder = num % baseNum
        num /= baseNum
        result = String(chars[remainder]) + result
        if num == 0 { break }
    }
    
    if negative {
        result = "-" + result
    }
    
    return result
}
```
loop { // cannot find 'loop' in scope

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    var baseNum = base
    var isNegative = false
    
    if x < 0 {
        isNegative = true
        num = -num
    }
    
    var digits = [Int]()
    
    while num > 0 {
        digits.append(num % base)
        num /= base
    }
    
    digits.reverse()
    
    for digit in digits {
        if baseNum > 10 {
            result += String(digit.advancedEnumRepresentation())
        } else {
            result += String(digit)
        }
    }
    
    if isNegative {
        result = "-" + result
    }
    
    return result
}
<|begin▁of▁sentence|>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    var baseNum = base
    var isNegative = false
    
    if x < 0 {
        isNegative = true
        num = -num
    }
    
    var digits = [Int]()
    
    while num > 0 {
        digits.append(num % base)
        num /= base
    }
    
    digits.reverse()
    
    for digit in digits {
        if baseNum > 10 {
            result += String(digit.advancedEnumRepresentation())
        } else {
            result += String(digit)
        }
    }
    
    if isNegative {
        result = "-" + result
    }
    
    return result
}
```
result += String(digit.advancedEnumRepresentation()) // value of type 'Int' has no member 'advancedEnumRepresentation'

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    var baseNum = base
    var isNegative = false
    
    if num < 0 {
        isNegative = true
        num = -num
    }
    
    var digits = [Int]()
    
    while num > 0 {
        digits.append(num % base)
        num /= base
    }
    
    digits.reverse()
    
    for digit in digits {
        if baseNum < 10 {
            result += String(digit)
        } else {
            result += String(digit as? Int ?? 0)
        }
    }
    
    if isNegative {
        result = "-" + result
    }
    
    return result
}
<|begin▁of▁sentence|>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    var baseNum = base
    var isNegative = false
    
    if num < 0 {
        isNegative = true
        num = -num
    }
    
    var digits = [Int]()
    
    while num > 0 {
        digits.append(num % base)
        num /= base
    }
    
    digits.reverse()
    
    for digit in digits {
        if baseNum < 10 {
            result += String(digit)
        } else {
            result += String(digit as? Int ?? 0)
        }
    }
    
    if isNegative {
        result = "-" + result
    }
    
    return result
}

print(changeBase(x: 8, base: 3)) // "22"
print(changeBase(x: 8, base: 2)) // "1000"
print(changeBase(x: 7, base: 2)) // "111"
```
var baseNum = base // variable 'baseNum' was never mutated; consider changing to 'let' constant
result += String(digit as? Int ?? 0) // conditional cast from 'Int' to 'Int' always succeeds

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var baseNum = base
    var remainderArray: [Int] = []
    
    // Convert the number to base
    while number > 0 {
        let remainder = number % base
        remainderArray.append(remainder)
        number /= base
    }
    
    // Convert the base number to string
    while !remainderArray.isEmpty {
        let remainder = remainderArray.removeLast()
        result += String(remainder)
    }
    
    return result
}
<|begin▁of▁sentence|>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var baseNum = base
    var remainderArray: [Int] = []
    
    // Convert the number to base
    while number > 0 {
        let remainder = number % base
        remainderArray.append(remainder)
        number /= base
    }
    
    // Convert the base number to string
    while !remainderArray.isEmpty {
        let remainder = remainderArray.removeLast()
        result += String(remainder)
    }
    
    return result
}
```
var baseNum = base // initialization of variable 'baseNum' was never used; consider replacing with assignment to '_' or removing it

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    var baseNum = base
    var isNegative = false
    
    if x < 0 {
        isNegative = true
        num = -num
    }
    
    var digits = [Int]()
    
    while num > 0 {
        digits.append(num % base)
        num /= base
    }
    
    digits.reverse()
    
    for digit in digits {
        if baseNum < 10 {
            result += String(digit)
        } else {
            result += String(digit as? Int ?? 0)
        }
    }
    
    if isNegative {
        result = "-" + result
    }
    
    return result
}
<|begin▁of▁sentence|>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    var baseNum = base
    var isNegative = false
    
    if x < 0 {
        isNegative = true
        num = -num
    }
    
    var digits = [Int]()
    
    while num > 0 {
        digits.append(num % base)
        num /= base
    }
    
    digits.reverse()
    
    for digit in digits {
        if baseNum < 10 {
            result += String(digit)
        } else {
            result += String(digit as? Int ?? 0)
        }
    }
    
    if isNegative {
        result = "-" + result
    }
    
    return result
}
```
var baseNum = base // variable 'baseNum' was never mutated; consider changing to 'let' constant
result += String(digit as? Int ?? 0) // conditional cast from 'Int' to 'Int' always succeeds

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var baseNum = base
    var remainderArray: [Int] = []
    
    // convert number to base
    while number > 0 {
        let remainder = number % base
        remainderArray.append(remainder)
        number /= base
    }
    
    // reverse the remainderArray to get the correct order
    var reversedArray = remainderArray
    reversedArray.reverse()
    
    // convert each remainder to its corresponding character
    for i in 0..<reversedArray.count {
        if i == 0 && reversedArray[i] > 0 {
            result += String(reversedArray[i] + Int('a') - 1)
        } else {
            result += String(reversedArray[i])
        }
    }
    
    return result
}
<|begin▁of▁sentence|>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var baseNum = base
    var remainderArray: [Int] = []
    
    // convert number to base
    while number > 0 {
        let remainder = number % base
        remainderArray.append(remainder)
        number /= base
    }
    
    // reverse the remainderArray to get the correct order
    var reversedArray = remainderArray
    reversedArray.reverse()
    
    // convert each remainder to its corresponding character
    for i in 0..<reversedArray.count {
        if i == 0 && reversedArray[i] > 0 {
            result += String(reversedArray[i] + Int('a') - 1)
        } else {
            result += String(reversedArray[i])
        }
    }
    
    return result
}

print(changeBase(x: 8, base: 3)) // "22"
print(changeBase(x: 8, base: 2)) // "1000"
print(changeBase(x: 7, base: 2)) // "111"
```
result += String(reversedArray[i] + Int('a') - 1) // single-quoted string literal found, use '"'
result += String(reversedArray[i] + Int('a') - 1) // value of optional type 'Int?' must be unwrapped to a value of type 'Int'

func changeBase(x: Int, base: Int) -> String {
    var num = x
    var baseNum = base
    var result = ""
    
    while num > 0 {
        result = String(num % baseNum) + result
        num /= baseNum
    }
    
    return result
}
<|begin▁of▁sentence|>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var num = x
    var baseNum = base
    var result = ""
    
    while num > 0 {
        result = String(num % baseNum) + result
        num /= baseNum
    }
    
    return result
}
```
var baseNum = base // variable 'baseNum' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var num = x
    var baseNum = base
    var result = ""
    
    while num > 0 {
        result = String(num % baseNum) + result
        num /= baseNum
    }
    
    return result
}
<|begin▁of▁sentence|>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var num = x
    var baseNum = base
    var result = ""
    
    while num > 0 {
        result = String(num % baseNum) + result
        num /= baseNum
    }
    
    return result
}
```
var baseNum = base // variable 'baseNum' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var num = x
    var baseNum = base
    var result = ""
    
    if num == 0 {
        return "0"
    }
    
    while num > 0 {
        let remainder = num % baseNum
        num = num / baseNum
        result = String(remainder) + result
    }
    
    return result
}
<|begin▁of▁sentence|>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var num = x
    var baseNum = base
    var result = ""
    
    if num == 0 {
        return "0"
    }
    
    while num > 0 {
        let remainder = num % baseNum
        num = num / baseNum
        result = String(remainder) + result
    }
    
    return result
}
```
var baseNum = base // variable 'baseNum' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var num = x
    var baseNum = base
    var result = ""
    
    while num > 0 {
        let remainder = num % baseNum
        num = num / baseNum
        result = String(remainder) + result
    }
    
    return result
}
<|begin▁of▁sentence|>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var num = x
    var baseNum = base
    var result = ""
    
    while num > 0 {
        let remainder = num % baseNum
        num = num / baseNum
        result = String(remainder) + result
    }
    
    return result
}
```
var baseNum = base // variable 'baseNum' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var num = x
    var baseNum = base
    var result = ""
    
    if num == 0 {
        return "0"
    }
    
    while num > 0 {
        result = String(num % baseNum) + result
        num = num / baseNum
    }
    
    return result
}
<|begin▁of▁sentence|>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var num = x
    var baseNum = base
    var result = ""
    
    if num == 0 {
        return "0"
    }
    
    while num > 0 {
        result = String(num % baseNum) + result
        num = num / baseNum
    }
    
    return result
}
```
var baseNum = base // variable 'baseNum' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var num = x
    var baseNum = base
    var result = ""
    
    while num > 0 {
        result = String(num % baseNum) + result
        num = num / baseNum
    }
    
    return result
}
<|begin▁of▁sentence|>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var num = x
    var baseNum = base
    var result = ""
    
    while num > 0 {
        result = String(num % baseNum) + result
        num = num / baseNum
    }
    
    return result
}
```
var baseNum = base // variable 'baseNum' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var num = x
    var baseNum = base
    var result = ""
    while num > 0 {
        result = String(num % baseNum) + result
        num /= baseNum
    }
    return result
}
<|begin▁of▁sentence|>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var num = x
    var baseNum = base
    var result = ""
    while num > 0 {
        result = String(num % baseNum) + result
        num /= baseNum
    }
    return result
}
```
var baseNum = base // variable 'baseNum' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var num = x
    var baseNum = base
    var result = ""
    
    // Check if base is less than 2 or greater than 10
    if baseNum < 2 || baseNum > 10 {
        return "Invalid base. Base should be between 2 and 10."
    }
    
    while num > 0 {
        result = String(num % baseNum) + result
        num = num / baseNum
    }
    
    return result
}
<|begin▁of▁sentence|>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var num = x
    var baseNum = base
    var result = ""
    
    // Check if base is less than 2 or greater than 10
    if baseNum < 2 || baseNum > 10 {
        return "Invalid base. Base should be between 2 and 10."
    }
    
    while num > 0 {
        result = String(num % baseNum) + result
        num = num / baseNum
    }
    
    return result
}
```
var baseNum = base // variable 'baseNum' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var num = x
    var baseNum = base
    var result = ""
    
    while num > 0 {
        let remainder = num % baseNum
        num = num / baseNum
        result = String(remainder) + result
    }
    
    return result
}
<|begin▁of▁sentence|>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var num = x
    var baseNum = base
    var result = ""
    
    while num > 0 {
        let remainder = num % baseNum
        num = num / baseNum
        result = String(remainder) + result
    }
    
    return result
}
```
var baseNum = base // variable 'baseNum' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var num = x
    var baseNum = base
    var result = ""
    
    while num > 0 {
        result = String(num % baseNum) + result
        num /= baseNum
    }
    
    return result
}
<|begin▁of▁sentence|>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var num = x
    var baseNum = base
    var result = ""
    
    while num > 0 {
        result = String(num % baseNum) + result
        num /= baseNum
    }
    
    return result
}
```
var baseNum = base // variable 'baseNum' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
<|begin▁of▁sentence|>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
<|begin▁of▁sentence|>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number = number / base
    }
    return result
}
<|begin▁of▁sentence|>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number = number / base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var num = x
    var result = ""
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num = num / base
    }
    return result
}
<|begin▁of▁sentence|>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var num = x
    var result = ""
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num = num / base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var num = x
    var result = ""
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num /= base
    }
    return result
}
<|begin▁of▁sentence|>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var num = x
    var result = ""
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
<|begin▁of▁sentence|>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var num = x
    var result = ""
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num /= base
    }
    return result
}
<|begin▁of▁sentence|>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var num = x
    var result = ""
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var num = x
    var result = ""
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num /= base
    }
    return result
}
<|begin▁of▁sentence|>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var num = x
    var result = ""
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var num = x
    var result = ""
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num /= base
    }
    return result
}
<|begin▁of▁sentence|>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var num = x
    var result = ""
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
<|begin▁of▁sentence|>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

import Foundation

func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
import Foundation

func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
```

import Foundation

func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
import Foundation

func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
```

import Foundation

func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
import Foundation

func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
```

import Foundation

func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
import Foundation

func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
```

import Foundation

func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
import Foundation

func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
```

import Foundation

func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
import Foundation

func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
```

import Foundation

func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
import Foundation

func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
```

import Foundation

func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
import Foundation

func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
```

import Foundation

func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
import Foundation

func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
```

import Foundation

func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
import Foundation

func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result == "" ? "0" : result
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result == "" ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result == "" ? "0" : result
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result == "" ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result == "" ? "0" : result
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result == "" ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result == "" ? "0" : result
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result == "" ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result == "" ? "0" : result
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result == "" ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result == "" ? "0" : result
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result == "" ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result == "" ? "0" : result
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result == "" ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var temp = x
    while temp > 0 {
        result = "\(temp % base)" + result
        temp = temp / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var temp = x
    while temp > 0 {
        result = "\(temp % base)" + result
        temp = temp / base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        result = String(number % base) + result
        number = number / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        result = String(number % base) + result
        number = number / base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = "\(x % base)" + result
        x = x / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = "\(x % base)" + result
        x = x / base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var temp = x
    while temp > 0 {
        result = String(temp % base) + result
        temp = temp / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var temp = x
    while temp > 0 {
        result = String(temp % base) + result
        temp = temp / base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var temp = x
    while temp > 0 {
        result = String(temp % base) + result
        temp = temp / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var temp = x
    while temp > 0 {
        result = String(temp % base) + result
        temp = temp / base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var temp = x
    while temp > 0 {
        result = String(temp % base) + result
        temp = temp / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var temp = x
    while temp > 0 {
        result = String(temp % base) + result
        temp = temp / base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var temp = x
    while temp > 0 {
        result = String(temp % base) + result
        temp = temp / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var temp = x
    while temp > 0 {
        result = String(temp % base) + result
        temp = temp / base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var temp = x
    while temp > 0 {
        result = String(temp % base) + result
        temp = temp / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var temp = x
    while temp > 0 {
        result = String(temp % base) + result
        temp = temp / base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = "\(x % base)" + result
        x = x / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = "\(x % base)" + result
        x = x / base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var temp = x
    while temp > 0 {
        result = String(temp % base) + result
        temp = temp / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var temp = x
    while temp > 0 {
        result = String(temp % base) + result
        temp = temp / base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var y = x
    while y > 0 {
        result = String(UnicodeScalar(Int(y % base))) + result
        y = y / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var y = x
    while y > 0 {
        result = String(UnicodeScalar(Int(y % base))) + result
        y = y / base
    }
    return result
}
```
result = String(UnicodeScalar(Int(y % base))) + result // value of optional type 'UnicodeScalar?' (aka 'Optional<Unicode.Scalar>') must be unwrapped to a value of type 'UnicodeScalar' (aka 'Unicode.Scalar')

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var baseString = "0123456789ABCDEF"
    
    while number > 0 {
        result = baseString[number % base] + result
        number /= base
    }
    
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var baseString = "0123456789ABCDEF"
    
    while number > 0 {
        result = baseString[number % base] + result
        number /= base
    }
    
    return result
}
```
result = baseString[number % base] + result // no exact matches in call to subscript

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var temp = x
    var remainder = 0
    while temp > 0 {
        remainder = temp % base
        temp = temp / base
        result = String(format: "%d%@", remainder, result)
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var temp = x
    var remainder = 0
    while temp > 0 {
        remainder = temp % base
        temp = temp / base
        result = String(format: "%d%@", remainder, result)
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    let digits = "0123456789ABCDEF"
    var result = ""
    var number = x
    while number > 0 {
        result = String(digits[number % base]) + result
        number /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    let digits = "0123456789ABCDEF"
    var result = ""
    var number = x
    while number > 0 {
        result = String(digits[number % base]) + result
        number /= base
    }
    return result
}
```
result = String(digits[number % base]) + result // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.

func changeBase(x: Int, base: Int) -> String {
    let digits = "0123456789ABCDEF"
    var result = ""
    var number = x
    
    repeat {
        result = String(digits[number % base]) + result
        number /= base
    } while number > 0
    
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    let digits = "0123456789ABCDEF"
    var result = ""
    var number = x
    
    repeat {
        result = String(digits[number % base]) + result
        number /= base
    } while number > 0
    
    return result
}
```
result = String(digits[number % base]) + result // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var temp = x
    var remainder = 0
    
    while temp > 0 {
        remainder = temp % base
        temp = temp / base
        result = String(format: "%d%@", remainder, result)
    }
    
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var temp = x
    var remainder = 0
    
    while temp > 0 {
        remainder = temp % base
        temp = temp / base
        result = String(format: "%d%@", remainder, result)
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var y = x
    while y > 0 {
        result = String(UnicodeScalar(Int(y % base))) + result
        y = y / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var y = x
    while y > 0 {
        result = String(UnicodeScalar(Int(y % base))) + result
        y = y / base
    }
    return result
}
```
result = String(UnicodeScalar(Int(y % base))) + result // value of optional type 'UnicodeScalar?' (aka 'Optional<Unicode.Scalar>') must be unwrapped to a value of type 'UnicodeScalar' (aka 'Unicode.Scalar')

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var y = x
    while y > 0 {
        result = String(format: "%d%@", y % base, result)
        y = y / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var y = x
    while y > 0 {
        result = String(format: "%d%@", y % base, result)
        y = y / base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var temp = x
    var i = 0
    while temp > 0 {
        var remainder = temp % base
        if remainder < 10 {
            result = String(remainder) + result
        } else {
            result = String(remainder - 10 + "A") + result
        }
        temp = temp / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var temp = x
    var i = 0
    while temp > 0 {
        var remainder = temp % base
        if remainder < 10 {
            result = String(remainder) + result
        } else {
            result = String(remainder - 10 + "A") + result
        }
        temp = temp / base
    }
    return result
}
```
result = String(remainder - 10 + "A") + result // binary operator '+' cannot be applied to operands of type 'Int' and 'String'

func changeBase(x: Int, base: Int) -> String {
    // TODO: implement changeBase
    // return ""
    var result = ""
    var temp = x
    var i = 0
    while temp > 0 {
        var remainder = temp % base
        if remainder < 10 {
            result = String(remainder) + result
        } else {
            result = String(remainder - 10 + "a") + result
        }
        temp = temp / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    // TODO: implement changeBase
    // return ""
    var result = ""
    var temp = x
    var i = 0
    while temp > 0 {
        var remainder = temp % base
        if remainder < 10 {
            result = String(remainder) + result
        } else {
            result = String(remainder - 10 + "a") + result
        }
        temp = temp / base
    }
    return result
}
```
result = String(remainder - 10 + "a") + result // binary operator '+' cannot be applied to operands of type 'Int' and 'String'

func changeBase(x: Int, base: Int) -> String {
    if x < 0 {
        return "Invalid input. Number should be non-negative."
    }
    
    if base < 2 || base > 10 {
        return "Invalid base. Base should be between 2 and 10."
    }
    
    var result = ""
    var num = x
    
    while num > 0 {
        let rem = num % base
        result = "\(rem)" + result
        num /= base
    }
    
    return result
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    if x < 0 {
        return "Invalid input. Number should be non-negative."
    }
    
    if base < 2 || base > 10 {
        return "Invalid base. Base should be between 2 and 10."
    }
    
    var result = ""
    var num = x
    
    while num > 0 {
        let rem = num % base
        result = "\(rem)" + result
        num /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    if x < 0 {
        return "Invalid input. Number should be non-negative."
    }
    
    if base < 2 || base > 10 {
        return "Invalid base. Base should be between 2 and 10."
    }
    
    var result = ""
    var num = x
    
    while num > 0 {
        let rem = num % base
        result = "\(rem)" + result
        num /= base
    }
    
    return result
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    if x < 0 {
        return "Invalid input. Number should be non-negative."
    }
    
    if base < 2 || base > 10 {
        return "Invalid base. Base should be between 2 and 10."
    }
    
    var result = ""
    var num = x
    
    while num > 0 {
        let rem = num % base
        result = "\(rem)" + result
        num /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    if x < 0 {
        return "Invalid input. Number should be non-negative."
    }
    
    if base < 2 || base > 10 {
        return "Invalid base. Base should be between 2 and 10."
    }
    
    var result = ""
    var num = x
    
    while num > 0 {
        let rem = num % base
        result = "\(rem)" + result
        num /= base
    }
    
    return result
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    if x < 0 {
        return "Invalid input. Number should be non-negative."
    }
    
    if base < 2 || base > 10 {
        return "Invalid base. Base should be between 2 and 10."
    }
    
    var result = ""
    var num = x
    
    while num > 0 {
        let rem = num % base
        result = "\(rem)" + result
        num /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    guard x >= 0, base > 0, base < 10 else {
        fatalError("Invalid input")
    }
    
    var result = ""
    var num = x
    
    while num > 0 {
        let rem = num % base
        result = String(rem) + result
        num /= base
    }
    
    return result
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    guard x >= 0, base > 0, base < 10 else {
        fatalError("Invalid input")
    }
    
    var result = ""
    var num = x
    
    while num > 0 {
        let rem = num % base
        result = String(rem) + result
        num /= base
    }
    
    return result
}

// Test cases
print(changeBase(x: 8, base: 3)) // "22"
print(changeBase(x: 8, base: 2)) // "1000"
print(changeBase(x: 7, base: 2)) // "111"
```

func changeBase(x: Int, base: Int) -> String {
    guard x >= 0, base > 0, base < 10 else {
        return ""
    }
    
    var result = ""
    var number = x
    
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    
    return result
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    guard x >= 0, base > 0, base < 10 else {
        return ""
    }
    
    var result = ""
    var number = x
    
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    if x < 0 {
        return "Invalid input. Number should be non-negative."
    }
    
    if base < 2 || base > 10 {
        return "Invalid base. Base should be between 2 and 10."
    }
    
    var result = ""
    var num = x
    
    while num > 0 {
        let rem = num % base
        result = "\(rem)" + result
        num /= base
    }
    
    return result
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    if x < 0 {
        return "Invalid input. Number should be non-negative."
    }
    
    if base < 2 || base > 10 {
        return "Invalid base. Base should be between 2 and 10."
    }
    
    var result = ""
    var num = x
    
    while num > 0 {
        let rem = num % base
        result = "\(rem)" + result
        num /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    guard base >= 2 && base < 10 else {
        fatalError("Base must be between 2 and 9")
    }
    
    let numberString = String(x, radix: base)
    
    return numberString
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    guard base >= 2 && base < 10 else {
        fatalError("Base must be between 2 and 9")
    }
    
    let numberString = String(x, radix: base)
    
    return numberString
}
```

func changeBase(x: Int, base: Int) -> String {
    if x < 0 {
        return "Invalid input. Number should be non-negative."
    }
    
    if base < 2 || base > 10 {
        return "Invalid base. Base should be between 2 and 10."
    }
    
    var result = ""
    var num = x
    
    while num > 0 {
        let rem = num % base
        result = "\(rem)" + result
        num /= base
    }
    
    return result
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    if x < 0 {
        return "Invalid input. Number should be non-negative."
    }
    
    if base < 2 || base > 10 {
        return "Invalid base. Base should be between 2 and 10."
    }
    
    var result = ""
    var num = x
    
    while num > 0 {
        let rem = num % base
        result = "\(rem)" + result
        num /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    if x < 0 {
        return "Invalid input. Number should be non-negative."
    }
    
    if base < 2 || base > 10 {
        return "Invalid base. Base should be between 2 and 10."
    }
    
    var result = ""
    var num = x
    
    while num > 0 {
        let rem = num % base
        result = "\(rem)" + result
        num /= base
    }
    
    return result
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    if x < 0 {
        return "Invalid input. Number should be non-negative."
    }
    
    if base < 2 || base > 10 {
        return "Invalid base. Base should be between 2 and 10."
    }
    
    var result = ""
    var num = x
    
    while num > 0 {
        let rem = num % base
        result = "\(rem)" + result
        num /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    guard x >= 0, base > 0, base < 10 else {
        return ""
    }
    
    var result = ""
    var number = x
    
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    
    return result
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    guard x >= 0, base > 0, base < 10 else {
        return ""
    }
    
    var result = ""
    var number = x
    
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    
    return result
}

// Test cases
print(changeBase(x: 8, base: 3))  // "22"
print(changeBase(x: 8, base: 2))  // "1000"
print(changeBase(x: 7, base: 2))  // "111"
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```
### Challenge
x /= base // left side of mutating operator isn't mutable: 'x' is a 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```
### Challenge
x /= base // left side of mutating operator isn't mutable: 'x' is a 'let' constant

func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
```
### Problem

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```
### Ex
x /= base // left side of mutating operator isn't mutable: 'x' is a 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder = remainder / base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder = remainder / base
    }
    return result
}
```
### Problem

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```
### Challenge
x /= base // left side of mutating operator isn't mutable: 'x' is a 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
```
### Challenge

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```
### Challenge
x /= base // left side of mutating operator isn't mutable: 'x' is a 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder = remainder / base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder = remainder / base
    }
    return result
}
```
### Problem

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
```
### Challenge

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    repeat {
        result = "\(number % base)" + result
        number /= base
    } while number > 0
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    repeat {
        result = "\(number % base)" + result
        number /= base
    } while number > 0
    return result
}
```
### Link

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    repeat {
        result = "\(number % base)" + result
        number /= base
    } while number > 0
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    repeat {
        result = "\(number % base)" + result
        number /= base
    } while number > 0
    return result
}
```
### Link

func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
```
### Test

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```
### Link

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    return result
}
```
### Link

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = "\(num % base)" + result
        num /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = "\(num % base)" + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = "\(num % base)" + result
        num /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = "\(num % base)" + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = "\(num % base)" + result
        num /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = "\(num % base)" + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = "\(num % base)" + result
        num /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = "\(num % base)" + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = "\(num % base)" + result
        num /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = "\(num % base)" + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = "\(num % base)" + result
        num /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = "\(num % base)" + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = "\(num % base)" + result
        num /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = "\(num % base)" + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = "\(num % base)" + result
        num /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = "\(num % base)" + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = "\(num % base)" + result
        num /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = "\(num % base)" + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = "\(num % base)" + result
        num /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = "\(num % base)" + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var base = base
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var base = base
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```
var base = base // variable 'base' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var base = base
    var result = ""
    while x > 0 {
        result = "\(x % base)" + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var base = base
    var result = ""
    while x > 0 {
        result = "\(x % base)" + result
        x /= base
    }
    return result
}
```
var base = base // variable 'base' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var base = base
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var base = base
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```
var base = base // variable 'base' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var base = base
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var base = base
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```
var base = base // variable 'base' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var base = base
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var base = base
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```
var base = base // variable 'base' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var base = base
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var base = base
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```
var base = base // variable 'base' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var base = base
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var base = base
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```
var base = base // variable 'base' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = "\(x % base)" + result
        x /= base
    }
    return result
}

func countDigits(x: Int, base: Int) -> Int {
    var x = x
    var count = 0
    while x > 0 {
        x /= base
        count += 1
    }
    return count
}

func sumDigits(x: Int, base: Int) -> Int {
    var x = x
    var sum = 0
    while x > 0 {
        sum += x % base
        x /= base
    }
    return sum
}

func productDigits(x: Int, base: Int) -> Int {
    var x = x
    var product = 1
    while x > 0 {
        product *= x % base
        x /= base
    }
    return product
}

func maxDigit(x: Int, base: Int) -> Int {
    var x = x
    var maxDigit = 0
    while x > 0 {
        maxDigit = max(maxDigit, x % base)
        x /= base
    }
    return maxDigit
}

func minDigit(x: Int, base: Int) -> Int {
    var x = x
    var minDigit = base - 1
    while x > 0 {
        minDigit = min(minDigit, x % base)
        x /= base
    }
    return minDigit
}

func averageDigits(x: Int, base: Int) -> Double {
    var x = x
    var sum = 0
    var count = 0
    while x > 0 {
        sum += x % base
        x /= base
        count += 1
    }
    return Double(sum) / Double(count)
}

func medianDigits(x: Int, base: Int) -> Int {
    var x = x
    var digits = [Int]()
    while x > 0 {
        digits.append(x % base)
        x /= base
    }
    digits.sort()
    return digits[digits.count / 2]
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = "\(x % base)" + result
        x /= base
    }
    return result
}

// Return the number of digits of x in base.
// countDigits(x: 8, base: 3) == 2
// countDigits(x: 8, base: 2) == 4
// countDigits(x: 8, base: 1) == 1
func countDigits(x: Int, base: Int) -> Int {
    var x = x
    var count = 0
    while x > 0 {
        x /= base
        count += 1
    }
    return count
}

// Return the sum of digits of x in base.
// sumDigits(x: 8, base: 3) == 2
// sumDigits(x: 8, base: 2) == 4
// sumDigits(x: 8, base: 1) == 8
func sumDigits(x: Int, base: Int) -> Int {
    var x = x
    var sum = 0
    while x > 0 {
        sum += x % base
        x /= base
    }
    return sum
}

// Return the product of digits of x in base.
// productDigits(x: 8, base: 3) == 2
// productDigits(x: 8, base: 2) == 4
// productDigits(x: 8, base: 1) == 8
func productDigits(x: Int, base: Int) -> Int {
    var x = x
    var product = 1
    while x > 0 {
        product *= x % base
        x /= base
    }
    return product
}

// Return the maximum digit of x in base.
// maxDigit(x: 8, base: 3) == 2
// maxDigit(x: 8, base: 2) == 1
// maxDigit(x: 8, base: 1) == 8
func maxDigit(x: Int, base: Int) -> Int {
    var x = x
    var maxDigit = 0
    while x > 0 {
        maxDigit = max(maxDigit, x % base)
        x /= base
    }
    return maxDigit
}

// Return the minimum digit of x in base.
// minDigit(x: 8, base: 3) == 2
// minDigit(x: 8, base: 2) == 0
// minDigit(x: 8, base: 1) == 0
func minDigit(x: Int, base: Int) -> Int {
    var x = x
    var minDigit = base - 1
    while x > 0 {
        minDigit = min(minDigit, x % base)
        x /= base
    }
    return minDigit
}

// Return the average of digits of x in base.
// averageDigits(x: 8, base: 3) == 2
// averageDigits(x: 8, base: 2) == 2
// averageDigits(x: 8, base: 1) == 8
func averageDigits(x: Int, base: Int) -> Double {
    var x = x
    var sum = 0
    var count = 0
    while x > 0 {
        sum += x % base
        x /= base
        count += 1
    }
    return Double(sum) / Double(count)
}

// Return the median of digits of x in base.
// medianDigits(x: 8, base: 3) == 2
// medianDigits(x: 8, base: 2) == 1
// medianDigits(x: 8, base: 1) == 8
func medianDigits(x: Int, base: Int) -> Int {
    var x = x
    var digits = [Int]()
    while x > 0 {
        digits.append(x % base)
        x /= base
    }
    digits.sort()
    return digits[digits.count / 2]
}

// Return the mode

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var base = base
    var result: [Int] = []
    while x > 0 {
        result.append(x % base)
        x /= base
    }
    return String(result.reverse().reduce("", combine: { $0 + String($1) }))
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var base = base
    var result: [Int] = []
    while x > 0 {
        result.append(x % base)
        x /= base
    }
    return String(result.reverse().reduce("", combine: { $0 + String($1) }))
}
```
return String(result.reverse().reduce("", combine: { $0 + String($1) })) // value of tuple type '()' has no member 'reduce'

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var base = base
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var base = base
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x /= base
    }
    return result
}
<|file_separator|>
var base = base // variable 'base' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
<|file_separator|>

func changeBase(x: Int, base: Int) -> String {
  var result = ""
  var x = x
  while x > 0 {
    result = String(x % base) + result
    x = x / base
  }
  return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
  var result = ""
  var x = x
  while x > 0 {
    result = String(x % base) + result
    x = x / base
  }
  return result
}
<|file_separator|>```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var base = base
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var base = base
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x /= base
    }
    return result
}
<|file_separator|>
var base = base // variable 'base' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var base = base
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var base = base
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
<|file_separator|>
var base = base // variable 'base' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x = x / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x = x / base
    }
    return result
}

// Change base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x = x / base
    }
    return result
}
<|file_separator|>

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x = x / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x = x / base
    }
    return result
}
<|file_separator|>

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x = x / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x = x / base
    }
    return result
}
<|file_separator|>

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x = x / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x = x / base
    }
    return result
}
<|file_separator|>```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = "\(remainder)" + result
        number = number / base
    }
    return result
}

func changeBase(x: String, base: Int) -> Int {
    var result = 0
    var number = x
    for i in 0..<number.count {
        let digit = Int(number[number.index(number.startIndex, offsetBy: i)])!
        result += digit * pow(base, Double(number.count - i - 1))
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = "\(remainder)" + result
        number = number / base
    }
    return result
}

// Change base of input number x to base.
// return integer representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 22, base: 3) == 8
// changeBase(x: 1000, base: 2) == 8
// changeBase(x: 111, base: 2) == 7
func changeBase(x: String, base: Int) -> Int {
    var result = 0
    var number = x
    for i in 0..<number.count {
        let digit = Int(number[number.index(number.startIndex, offsetBy: i)])!
        result += digit * pow(base, Double(number.count - i - 1))
    }
    return result
}
<|file_separator|>
let digit = Int(number[number.index(number.startIndex, offsetBy: i)])! // subscript 'subscript(_:)' requires that 'String.Index' conform to 'RangeExpression'
result += digit * pow(base, Double(number.count - i - 1)) // cannot convert value of type 'Int' to expected argument type 'Double'
result += digit * pow(base, Double(number.count - i - 1)) // binary operator '+=' cannot be applied to operands of type 'Int' and 'Duration'
result += digit * pow(base, Double(number.count - i - 1)) // cannot convert value of type 'Double' to expected argument type 'Int'

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x = x / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x = x / base
    }
    return result
}
<|file_separator|>

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
<|file_separator|>

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    var base = base
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    var base = base
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
<|file_separator|>
var base = base // variable 'base' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x /= base
    }
    return result
}
<|file_separator|>

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        let digit = x % base
        result = "\(digit)" + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        let digit = x % base
        result = "\(digit)" + result
        x /= base
    }
    return result
}
<|file_separator|>

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var base = base
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var base = base
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x /= base
    }
    return result
}
<|file_separator|>```
var base = base // variable 'base' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var base = base
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x = x / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var base = base
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x = x / base
    }
    return result
}
<|file_separator|>
var base = base // variable 'base' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x = x / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x = x / base
    }
    return result
}
<|file_separator|>

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    var base = base
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x = x / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    var base = base
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x = x / base
    }
    return result
}
<|file_separator|>
var base = base // variable 'base' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = remainder.description + result
        x = x / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = remainder.description + result
        x = x / base
    }
    return result
}
<|file_separator|>

func changeBase(x: Int, base: Int) -> String {
    var result: String = ""
    var x = x
    while x > 0 {
        let remainder = x % base
        x = x / base
        if remainder > 9 {
            result = String(Character(UnicodeScalar(65 + remainder - 10)!) + result)
        } else {
            result = String(remainder) + result
        }
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result: String = ""
    var x = x
    while x > 0 {
        let remainder = x % base
        x = x / base
        if remainder > 9 {
            result = String(Character(UnicodeScalar(65 + remainder - 10)!) + result)
        } else {
            result = String(remainder) + result
        }
    }
    return result
}
```
result = String(Character(UnicodeScalar(65 + remainder - 10)!) + result) // cannot convert value of type 'Character' to expected argument type 'String'

func changeBase(x: Int, base: Int) -> String {
    var result: String = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x = x / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result: String = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x = x / base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result: String = ""
    var x = x
    while x > 0 {
        let remainder = x % base
        x = x / base
        result = String(remainder) + result
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result: String = ""
    var x = x
    while x > 0 {
        let remainder = x % base
        x = x / base
        result = String(remainder) + result
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = "\(x % base)" + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = "\(x % base)" + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result: String = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result: String = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x = x / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x = x / base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result: String = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result: String = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var temp = x
    while temp != 0 {
        result = String(temp % base) + result
        temp = temp / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var temp = x
    while temp != 0 {
        result = String(temp % base) + result
        temp = temp / base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder: Int
    var quotient = x
    
    while quotient > 0 {
        remainder = quotient % base
        quotient = quotient / base
        
        result = String(remainder) + result
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder: Int
    var quotient = x
    
    while quotient > 0 {
        remainder = quotient % base
        quotient = quotient / base
        
        result = String(remainder) + result
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var remainder: Int
    var quotient: Int
    while (number > 0) {
        remainder = number % base
        quotient = number / base
        result = result + String(remainder)
        number = quotient
    }
    return result.reversed()
}

func changeBase(x: String, base: Int) -> String {
    var result = ""
    var number = 0
    var remainder: Int
    var quotient: Int
    var digits = [String("0"), String("1"), String("2"), String("3"), String("4"), String("5"), String("6"), String("7"), String("8"), String("9"), String("A"), String("B"), String("C"), String("D"), String("E"), String("F")]
    for i in x.reversed().indices {
        remainder = digits.index(x[i])
        quotient = number
        number = quotient * base + remainder
    }
    while (number > 0) {
        remainder = number % base
        quotient = number / base
        result = result + digits[remainder]
        number = quotient
    }
    return result.reversed()
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var remainder: Int
    var quotient: Int
    while (number > 0) {
        remainder = number % base
        quotient = number / base
        result = result + String(remainder)
        number = quotient
    }
    return result.reversed()
}

// Change base of input string x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase("1000", base: 2) == "8"
// changeBase("111", base: 2) == "7"
// changeBase("1000", base: 3) == "22"
// changeBase("111", base: 3) == "8"
// changeBase("1000", base: 8) == "8"
// changeBase("111", base: 8) == "7"
// changeBase("1000", base: 16) == "1E"
// changeBase("111", base: 16) == "77"
func changeBase(x: String, base: Int) -> String {
    var result = ""
    var number = 0
    var remainder: Int
    var quotient: Int
    var digits = [String("0"), String("1"), String("2"), String("3"), String("4"), String("5"), String("6"), String("7"), String("8"), String("9"), String("A"), String("B"), String("C"), String("D"), String("E"), String("F")]
    for i in x.reversed().indices {
        remainder = digits.index(x[i])
        quotient = number
        number = quotient * base + remainder
    }
    while (number > 0) {
        remainder = number % base
        quotient = number / base
        result = result + digits[remainder]
        number = quotient
    }
    return result.reversed()
}

// Change base of input string x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase("1000", base: 2) == "8"
// changeBase("111", base: 2) == "7"
// changeBase("1000", base: 3) == "22"
// changeBase("111", base: 3) == "8"
// changeBase("1000", base: 8) == "8"
// changeBase("111", base: 8) == "7"
// changeBase("1000", base: 16) == "1E"
// changeBase("111", base: 16) == "77"
func changeBase(x: String, base: Int) -> String {
    var result = ""
    var number = 0
    var remainder: Int
    var quotient: Int
    var digits = [String("0"), String("1"), String("2"), String("3"), String("4"), String("5"), String("6"), String("7"), String("8"), String("9"), String("A"), String("B"), String("C"), String("D"), String("E"), String("F")]
    for i in x.reversed().indices {
        remainder = digits.index(x[i])
        quotient = number
        number = quotient * base + remainder
    }
    while (number > 0) {
        remainder = number % base
        quotient = number / base
        result = result + digits[remainder]
        number = quotient
    }
    return result.reversed()
}

// Change base of input string x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase("1000", base: 2) == "8"
// changeBase("111", base: 2) == "7"
// changeBase("1000", base: 3) == "22"
// changeBase("111", base: 3) == "8"
// changeBase("1000", base: 8) == "8"
// changeBase("111", base: 8) == "7"
// changeBase("1000", base: 16) == "1E"
// changeBase("111
return result.reversed() // no 'reversed' candidates produce the expected contextual result type 'String'
remainder = digits.index(x[i]) // missing argument label 'of:' in call
remainder = digits.index(x[i]) // value of optional type 'Array<String>.Index?' (aka 'Optional<Int>') must be unwrapped to a value of type 'Array<String>.Index' (aka 'Int')
remainder = digits.index(x[i]) // subscript 'subscript(_:)' requires that 'DefaultIndices<ReversedCollection<String>>.Element' (aka 'ReversedCollection<String>.Index') conform to 'RangeExpression'
return result.reversed() // no 'reversed' candidates produce the expected contextual result type 'String'

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = 0
    var quotient = x
    while quotient > 0 {
        remainder = quotient % base
        result = result + String(remainder)
        quotient = quotient / base
    }
    return result.reversed()
}

func changeBase(x: String, base: Int) -> Int {
    var result = 0
    var power = 0
    var length = x.length
    for i in length - 1 downTo 0 {
        var digit = x[i]
        if digit >= '0' && digit <= '9' {
            digit = digit - '0'
        } else if digit >= 'A' && digit <= 'Z' {
            digit = digit - 'A' + 10
        } else if digit >= 'a' && digit <= 'z' {
            digit = digit - 'a' + 10
        } else {
            return 0
        }
        result = result + digit * Int(base) ^ power
        power = power + 1
    }
    return result
}

func changeBase(x: String, base: Int) -> String {
    var result = ""
    var remainder = 0
    var quotient = x
    var length = x.length
    for i in length - 1 downTo 0 {
        var digit = x[i]
        if digit >= '0' && digit <= '9' {
            digit = digit - '0'
        } else if digit >= 'A' && digit <= 'Z' {
            digit = digit - 'A' + 10
        } else if digit >= 'a' && digit <= 'z' {
            digit = digit - 'a' + 10
        } else {
            return ""
        }
        result = result + String(digit)
        quotient = quotient / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = 0
    var quotient = x
    while quotient > 0 {
        remainder = quotient % base
        result = result + String(remainder)
        quotient = quotient / base
    }
    return result.reversed()
}

// Change numerical base of input string x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: "1000", base: 2) == 8
// changeBase(x: "111", base: 2) == 7
// changeBase(x: "1000", base: 3) == 8
// changeBase(x: "111", base: 3) == 7
// changeBase(x: "1000", base: 10) == 8
// changeBase(x: "111", base: 10) == 7
// changeBase(x: "1000", base: 16) == 8
// changeBase(x: "111", base: 16) == 7
func changeBase(x: String, base: Int) -> Int {
    var result = 0
    var power = 0
    var length = x.length
    for i in length - 1 downTo 0 {
        var digit = x[i]
        if digit >= '0' && digit <= '9' {
            digit = digit - '0'
        } else if digit >= 'A' && digit <= 'Z' {
            digit = digit - 'A' + 10
        } else if digit >= 'a' && digit <= 'z' {
            digit = digit - 'a' + 10
        } else {
            return 0
        }
        result = result + digit * Int(base) ^ power
        power = power + 1
    }
    return result
}

// Change numerical base of input string x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: "1000", base: 2) == "1000"
// changeBase(x: "111", base: 2) == "111"
// changeBase(x: "1000", base: 3) == "1000"
// changeBase(x: "111", base: 3) == "111"
// changeBase(x: "1000", base: 10) == "1000"
// changeBase(x: "111", base: 10) == "111"
// changeBase(x: "1000", base: 16) == "1000"
// changeBase(x: "111", base: 16) == "111"
func changeBase(x: String, base: Int) -> String {
    var result = ""
    var remainder = 0
    var quotient = x
    var length = x.length
    for i in length - 1 downTo 0 {
        var digit = x[i]
        if digit >= '0' && digit <= '9' {
            digit = digit - '0'
        } else if digit >= 'A' && digit <= 'Z' {
            digit = digit - 'A' + 10
        } else if digit >= 'a' && digit <= 'z' {
            digit = digit - 'a' + 10
        } else {
            return ""
        }
        result = result + String(digit)
        quotient = quotient / base
    }
    return result
}

// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = 0
    var quotient = x
    while quotient > 0 {
        remainder = quotient % base
        result = result + String(remainder
return result.reversed() // no 'reversed' candidates produce the expected contextual result type 'String'
var length = x.length // value of type 'String' has no member 'length'
for i in length - 1 downTo 0 { // expected '{' to start the body of for-each loop
if digit >= '0' && digit <= '9' { // single-quoted string literal found, use '"'
if digit >= '0' && digit <= '9' { // single-quoted string literal found, use '"'
digit = digit - '0' // single-quoted string literal found, use '"'
} else if digit >= 'A' && digit <= 'Z' { // single-quoted string literal found, use '"'
} else if digit >= 'A' && digit <= 'Z' { // single-quoted string literal found, use '"'
digit = digit - 'A' + 10 // single-quoted string literal found, use '"'
} else if digit >= 'a' && digit <= 'z' { // single-quoted string literal found, use '"'
} else if digit >= 'a' && digit <= 'z' { // single-quoted string literal found, use '"'
digit = digit - 'a' + 10 // single-quoted string literal found, use '"'
var length = x.length // value of type 'String' has no member 'length'
for i in length - 1 downTo 0 { // expected '{' to start the body of for-each loop
if digit >= '0' && digit <= '9' { // single-quoted string literal found, use '"'
if digit >= '0' && digit <= '9' { // single-quoted string literal found, use '"'
digit = digit - '0' // single-quoted string literal found, use '"'
} else if digit >= 'A' && digit <= 'Z' { // single-quoted string literal found, use '"'
} else if digit >= 'A' && digit <= 'Z' { // single-quoted string literal found, use '"'
digit = digit - 'A' + 10 // single-quoted string literal found, use '"'
} else if digit >= 'a' && digit <= 'z' { // single-quoted string literal found, use '"'
} else if digit >= 'a' && digit <= 'z' { // single-quoted string literal found, use '"'
digit = digit - 'a' + 10 // single-quoted string literal found, use '"'

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var current = x
    while current > 0 {
        result = string(current % base) .. result
        current = current / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var current = x
    while current > 0 {
        result = string(current % base) .. result
        current = current / base
    }
    return result
}

// Change numerical base of input string x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: "1000", base: 2) == 8
// changeBase(x: "111", base: 2) == 7
// changeBase(x: "1000", base: 3) == 8
// changeBase(x: "1000", base: 4) == 4
// changeBase(x: "1000", base: 5) == 5
// changeBase(x: "1000", base: 6) == 6
// changeBase(x: "1000", base: 7) == 7
// changeBase(x: "1000", base: 8) == 8
// changeBase(x: "1000", base: 9) == 9
// changeBase(x: "1000", base: 10) == 10
// changeBase(x: "1000", base: 11) == 11
// changeBase(x: "1000", base: 12) == 12
// changeBase(x: "1000", base: 13) == 13
// changeBase(x: "1000", base: 14) == 14
// changeBase(x: "1000", base: 15) == 15
// changeBase(x: "1000", base: 16) == 16
// changeBase(x: "1000", base: 17) == 17
// changeBase(x: "1000", base: 18) == 18
// changeBase(x: "1000", base: 19) == 19
// changeBase(x: "1000", base: 20) == 20
// changeBase(x: "1000", base: 21) == 21
// changeBase(x: "1000", base: 22) == 22
// changeBase(x: "1000", base: 23) == 23
// changeBase(x: "1000", base: 24) == 24
// changeBase(x: "1000", base: 25) == 25
// changeBase(x: "1000", base: 26) == 26
// changeBase(x: "1000", base: 27) == 27
// changeBase(x: "1000", base: 28) == 28
// changeBase(x: "1000", base: 29) == 29
// changeBase(x: "1000", base: 30) == 30
// changeBase(x: "1000", base: 31) == 31
// changeBase(x: "1000", base: 32) == 32
// changeBase(x: "1000", base: 33) == 33
// changeBase(x: "1000", base: 34) == 34
// changeBase(x: "1000", base: 35) == 35
// changeBase(x: "1000", base: 36) == 36
// changeBase(x: "1000", base: 37) == 37
// changeBase(x: "1000", base: 38) == 38
// changeBase(x: "1000", base: 39) == 39
// changeBase(x: "1000", base: 40) == 40
// changeBase(x: "1000", base: 41) == 41
// changeBase(x: "1000", base: 42) ==
result = string(current % base) .. result // cannot find operator '..' in scope; did you mean '...'?
result = string(current % base) .. result // cannot find 'string' in scope

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var remainder: Int
    var base = base
    while number > 0 {
        remainder = number % base
        number = number / base
        result = result + String(remainder)
    }
    return result
}

func changeBase(x: String, base: Int) -> String {
    var result = ""
    var number = 0
    var remainder: Int
    var base = base
    for i in 0..<x.count {
        remainder = Int(x[i]) - 48
        number = number * base + remainder
    }
    while number > 0 {
        remainder = number % base
        number = number / base
        result = result + String(remainder)
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var remainder: Int
    var base = base
    while number > 0 {
        remainder = number % base
        number = number / base
        result = result + String(remainder)
    }
    return result
}

// Change numerical base of input string x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: "111", base: 2) == "7"
// changeBase(x: "1000", base: 3) == "8"
// changeBase(x: "111", base: 2) == "7"
// changeBase(x: "1000", base: 2) == "8"
func changeBase(x: String, base: Int) -> String {
    var result = ""
    var number = 0
    var remainder: Int
    var base = base
    for i in 0..<x.count {
        remainder = Int(x[i]) - 48
        number = number * base + remainder
    }
    while number > 0 {
        remainder = number % base
        number = number / base
        result = result + String(remainder)
    }
    return result
}

// Change numerical base of input string x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: "111", base: 2) == "7"
// changeBase(x: "1000", base: 3) == "8"
// changeBase(x: "111", base: 2) == "7"
// changeBase(x: "1000", base: 2) == "8"
func changeBase(x: String, base: Int) -> String {
    var result = ""
    var number = 0
    var remainder: Int
    var base = base
    for i in 0..<x.count {
        remainder = Int(x[i]) - 48
        number = number * base + remainder
    }
    while number > 0 {
        remainder = number % base
        number = number / base
        result = result + String(remainder)
    }
    return result
}

// Change numerical base of input string x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: "111", base: 2) == "7"
// changeBase(x: "1000", base: 3) == "8"
// changeBase(x: "111", base: 2) == "7"
// changeBase(x: "1000", base: 2) == "8"
func changeBase(x: String, base: Int) -> String {
    var result = ""
    var number = 0
    var remainder: Int
    var base = base
    for i in 0..<x.count {
        remainder = Int(x[i]) - 48
        number = number * base + remainder
    }
    while number > 0 {
        remainder = number % base
        number = number / base
        result = result + String(remainder)
    }
    return result
}

// Change numerical base of input string x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: "111", base: 2) == "7"
// changeBase(x: "1000", base: 3) == "8"
// changeBase(x: "111", base: 2) == "7"
// changeBase(x: "1000", base: 2) == "8"
func changeBase(x: String, base: Int) -> String {
    var result = ""
    var number = 0
    var remainder: Int
    var base = base
    for i in 0..<x.count {
        remainder = Int(x[i]) - 48
        number = number * base + remainder
    }
    while number > 0 {
        remainder = number % base
        number = number / base
        result = result + String(remainder)
    }
    return result
}

// Change numerical base of input
var base = base // variable 'base' was never mutated; consider changing to 'let' constant
remainder = Int(x[i]) - 48 // no exact matches in call to initializer

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var remainder: Int
    var quotient: Int
    while (number > 0) {
        remainder = number % base
        quotient = number / base
        result = result + String(remainder)
        number = quotient
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var remainder: Int
    var quotient: Int
    while (number > 0) {
        remainder = number % base
        quotient = number / base
        result = result + String(remainder)
        number = quotient
    }
    return result
}
```
 // XCTAssertTrue failed

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder: Int = 0
    var quotient: Int = x
    while quotient > 0 {
        remainder = quotient % base
        quotient = quotient / base
        result = result + String(remainder)
    }
    return result.reversed()
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder: Int = 0
    var quotient: Int = x
    while quotient > 0 {
        remainder = quotient % base
        quotient = quotient / base
        result = result + String(remainder)
    }
    return result.reversed()
}

// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder: Int = 0
    var quotient: Int = x
    while quotient > 0 {
        remainder = quotient % base
        quotient = quotient / base
        result = result + String(remainder)
    }
    return result.reversed()
}

// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder: Int = 0
    var quotient: Int = x
    while quotient > 0 {
        remainder = quotient % base
        quotient = quotient / base
        result = result + String(remainder)
    }
    return result.reversed()
}

// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder: Int = 0
    var quotient: Int = x
    while quotient > 0 {
        remainder = quotient % base
        quotient = quotient / base
        result = result + String(remainder)
    }
    return result.reversed()
}

// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder: Int = 0
    var quotient: Int = x
    while quotient > 0 {
        remainder = quotient % base
        quotient = quotient / base
        result = result + String(remainder)
    }
    return result.reversed()
}

// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder: Int = 0
    var quotient: Int = x
    while quotient > 0 {
        remainder = quotient % base
        quotient = quotient / base
        result = result + String(remainder)
    }
    return result.reversed()
}

// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8
return result.reversed() // no 'reversed' candidates produce the expected contextual result type 'String'

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    var rem: Int
    while num != 0 {
        rem = num % base
        result = String(rem) + result
        num = (num / base)
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    var rem: Int
    while num != 0 {
        rem = num % base
        result = String(rem) + result
        num = (num / base)
    }
    return result
}

// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    var rem: Int
    while num != 0 {
        rem = num % base
        result = String(rem) + result
        num = (num / base)
    }
    return result
}

// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    var rem: Int
    while num != 0 {
        rem = num % base
        result = String(rem) + result
        num = (num / base)
    }
    return result
}

// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    var rem: Int
    while num != 0 {
        rem = num % base
        result = String(rem) + result
        num = (num / base)
    }
    return result
}

// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    var rem: Int
    while num != 0 {
        rem = num % base
        result = String(rem) + result
        num = (num / base)
    }
    return result
}

// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    var rem: Int
    while num != 0 {
        rem = num % base
        result = String(rem) + result
        num = (num / base)
    }
    return result
}

// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = 0
    var quotient = 0
    var temp = x
    var base = base
    var digits = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9"]
    while temp != 0 {
        remainder = temp % base
        quotient = temp / base
        temp = quotient
        result = digits[remainder] + result
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = 0
    var quotient = 0
    var temp = x
    var base = base
    var digits = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9"]
    while temp != 0 {
        remainder = temp % base
        quotient = temp / base
        temp = quotient
        result = digits[remainder] + result
    }
    return result
}

// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = 0
    var quotient = 0
    var temp = x
    var base = base
    var digits = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9"]
    while temp != 0 {
        remainder = temp % base
        quotient = temp / base
        temp = quotient
        result = digits[remainder] + result
    }
    return result
}

// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = 0
    var quotient = 0
    var temp = x
    var base = base
    var digits = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9"]
    while temp != 0 {
        remainder = temp % base
        quotient = temp / base
        temp = quotient
        result = digits[remainder] + result
    }
    return result
}

// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = 0
    var quotient = 0
    var temp = x
    var base = base
    var digits = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9"]
    while temp != 0 {
        remainder = temp % base
        quotient = temp / base
        temp = quotient
        result = digits[remainder] + result
    }
    return result
}

// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = 0
    var quotient = 0
    var temp = x
    var base = base
    var digits = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9"]
    while temp != 0 {
        remainder = temp % base
        quotient = temp / base
        temp = quotient
        result = digits[remainder] + result
    }
    return result
}

// Change numerical base of input number x to
var base = base // variable 'base' was never mutated; consider changing to 'let' constant
var digits = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9"] // variable 'digits' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var current = x
    while current > 0 {
        result = string(current % base) + result
        current = current / base
    }
    return result
}

func changeBase(x: String, base: Int) -> String {
    var result = 0
    for i in 0..<x.count {
        result = result * base + Int(x[i]) - 48
    }
    return changeBase(result, base)
}

func changeBase(x: String, base: Int) -> String {
    var result = ""
    var current = x
    while current > 0 {
        result = string(current % base) + result
        current = current / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var current = x
    while current > 0 {
        result = string(current % base) + result
        current = current / base
    }
    return result
}

// Change numerical base of input string x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: "111", base: 2) == "7"
// changeBase(x: "1000", base: 2) == "8"
// changeBase(x: "111", base: 3) == "17"
func changeBase(x: String, base: Int) -> String {
    var result = 0
    for i in 0..<x.count {
        result = result * base + Int(x[i]) - 48
    }
    return changeBase(result, base)
}

// Change numerical base of input string x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: "111", base: 2) == "7"
// changeBase(x: "1000", base: 2) == "8"
// changeBase(x: "111", base: 3) == "17"
func changeBase(x: String, base: Int) -> String {
    var result = ""
    var current = x
    while current > 0 {
        result = string(current % base) + result
        current = current / base
    }
    return result
}

// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var current = x
    while current > 0 {
        result = string(current % base) + result
        current = current / base
    }
    return result
}

// Change numerical base of input string x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: "111", base: 2) == "7"
// changeBase(x: "1000", base: 2) == "8"
// changeBase(x: "111", base: 3) == "17"
func changeBase(x: String, base: Int) -> String {
    var result = 0
    for i in 0..<x.count {
        result = result * base + Int(x[i]) - 48
    }
    return changeBase(result, base)
}

// Change numerical base of input string x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: "111", base: 2) == "7"
// changeBase(x: "1000", base: 2) == "8"
// changeBase(x: "111", base: 3) == "17"
func changeBase(x: String, base: Int) -> String {
    var result = ""
    var current = x
    while current > 0 {
        result = string(current % base) + result
        current = current / base
    }
    return result
}

// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var current = x
    while current > 0 {
        result = string(current % base) + result
        current = current / base
    }
    return result
}

// Change numerical base of
result = string(current % base) + result // cannot find 'string' in scope
result = result * base + Int(x[i]) - 48 // no exact matches in call to initializer
return changeBase(result, base) // missing argument labels 'x:base:' in call
func changeBase(x: String, base: Int) -> String { // invalid redeclaration of 'changeBase(x:base:)'
while current > 0 { // binary operator '>' cannot be applied to operands of type 'String' and 'Int'
result = string(current % base) + result // cannot find 'string' in scope
result = string(current % base) + result // cannot convert value of type 'String' to expected argument type 'Int'
current = current / base // binary operator '/' cannot be applied to operands of type 'String' and 'Int'
current = current / base // no '/' candidates produce the expected contextual result type 'String'

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var remainder: Int
    var base = base
    while number > 0 {
        remainder = number % base
        if remainder < 10 {
            result = string(remainder) + result
        } else {
            result = string(remainder - 10 + 'A') + result
        }
        number = number / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var remainder: Int
    var base = base
    while number > 0 {
        remainder = number % base
        if remainder < 10 {
            result = string(remainder) + result
        } else {
            result = string(remainder - 10 + 'A') + result
        }
        number = number / base
    }
    return result
}
```
result = string(remainder) + result // cannot find 'string' in scope
result = string(remainder - 10 + 'A') + result // single-quoted string literal found, use '"'
result = string(remainder - 10 + 'A') + result // cannot find 'string' in scope
result = string(remainder - 10 + 'A') + result // binary operator '+' cannot be applied to operands of type 'Int' and 'String'

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<end_of_turn>
<start_of_turn>model
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<end_of_turn>
<start_of_turn>model
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<end_of_turn>
<start_of_turn>model
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<end_of_turn>
<start_of_turn>model
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<end_of_turn>
<start_of_turn>model
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<end_of_turn>
<start_of_turn>model
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var remainder: Int
    
    while number > 0 {
        remainder = number % base
        number /= base
        result = "\(remainder)" + result
    }
    return result
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<end_of_turn>
<start_of_turn>model
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var remainder: Int
    
    while number > 0 {
        remainder = number % base
        number /= base
        result = "\(remainder)" + result
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<end_of_turn>
<start_of_turn>model
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<end_of_turn>
<start_of_turn>model
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<end_of_turn>
<start_of_turn>model
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x

    while number > 0 {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    }

    return result.isEmpty ? "0" : result
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<end_of_turn>
<start_of_turn>model
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x

    while number > 0 {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    }

    return result.isEmpty ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result.isEmpty ? "0" : result
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<end_of_turn>
<start_of_turn>model
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result.isEmpty ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result.isEmpty ? "0" : result
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<end_of_turn>
<start_of_turn>model
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result.isEmpty ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x

    while number > 0 {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    }

    return result.isEmpty ? "0" : result
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<end_of_turn>
<start_of_turn>model
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x

    while number > 0 {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    }

    return result.isEmpty ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result.isEmpty ? "0" : result
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<end_of_turn>
<start_of_turn>model
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result.isEmpty ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result.isEmpty ? "0" : result
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<end_of_turn>
<start_of_turn>model
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result.isEmpty ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result.isEmpty ? "0" : result
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<end_of_turn>
<start_of_turn>model
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result.isEmpty ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x

    while number > 0 {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    }

    return result.isEmpty ? "0" : result
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<end_of_turn>
<start_of_turn>model
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x

    while number > 0 {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    }

    return result.isEmpty ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x

    while number > 0 {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    }

    return result.isEmpty ? "0" : result
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<end_of_turn>
<start_of_turn>model
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x

    while number > 0 {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    }

    return result.isEmpty ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x

    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }

    return result.isEmpty ? "0" : result
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<end_of_turn>
<start_of_turn>model
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x

    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }

    return result.isEmpty ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111" [/INST] ```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111" [/INST] ```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111" [/INST] ```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111" [/INST] ```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111" [/INST] ```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111" [/INST] ```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111" [/INST] ```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111" [/INST] ```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111" [/INST] ```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111" [/INST] ```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111" [/INST] ```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111" [/INST] ```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x

    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }

    return result
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111" [/INST] ```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x

    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }

    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111" [/INST] ```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111" [/INST] ```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x

    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }

    return result
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111" [/INST] ```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x

    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }

    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111" [/INST] ```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111" [/INST] ```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111" [/INST] ```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111" [/INST] ```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111" [/INST] ```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111" [/INST] ```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111" [/INST] ```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111" [/INST] ```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111" [/INST] ```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111" [/INST] ```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111" [/INST] ```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111" [/INST] ```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111" [/INST] ```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111" [/INST] ```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        let digit = remainder % base
        result = "\(digit)" + result
        remainder /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        let digit = remainder % base
        result = "\(digit)" + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    guard x >= 0 && base >= 2 && base <= 10 else {
        return "Invalid input"
    }
    
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    guard x >= 0 && base >= 2 && base <= 10 else {
        return "Invalid input"
    }
    
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = "\(num % base)" + result
        num /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = "\(num % base)" + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var temp = x
    while temp > 0 {
        result = "\(temp % base)" + result
        temp /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var temp = x
    while temp > 0 {
        result = "\(temp % base)" + result
        temp /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var temp = x
    while temp > 0 {
        let remainder = temp % base
        result = "\(remainder)" + result
        temp /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var temp = x
    while temp > 0 {
        let remainder = temp % base
        result = "\(remainder)" + result
        temp /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var temp = x
    while temp > 0 {
        let remainder = temp % base
        result = "\(remainder)" + result
        temp = temp / base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var temp = x
    while temp > 0 {
        let remainder = temp % base
        result = "\(remainder)" + result
        temp = temp / base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        let digit = remainder % base
        result = String(digit) + result
        remainder /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        let digit = remainder % base
        result = String(digit) + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
```

func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
```

func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
```

func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
```

func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
```

func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
```

func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
```

func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
```

func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
```

func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
```

func changeBase(x: Int, base: Int) -> String {
    let chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
    var result = ""
    var num = x
    var isNegative = false
    
    if x < 0 {
        isNegative = true
        num = -x
    }
    
    var divisor = 1
    var remainder = 0
    
    while num > 0 {
        remainder = num % base
        num /= base
        result = String(chars[remainder]) + result
    }
    
    if isNegative {
        result = "-" + result
    }
    
    return result
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    let chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
    var result = ""
    var num = x
    var isNegative = false
    
    if x < 0 {
        isNegative = true
        num = -x
    }
    
    var divisor = 1
    var remainder = 0
    
    while num > 0 {
        remainder = num % base
        num /= base
        result = String(chars[remainder]) + result
    }
    
    if isNegative {
        result = "-" + result
    }
    
    return result
}
```
var divisor = 1 // initialization of variable 'divisor' was never used; consider replacing with assignment to '_' or removing it
result = String(chars[remainder]) + result // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.

func changeBase(x: Int, base: Int) -> String {
    let chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
    var result = ""
    var num = x
    var remainder: Int
    var quotient: Int
    
    // Convert the number to base 'base'
    while num > 0 {
        remainder = num % base
        quotient = num / base
        result = String(chars[remainder]) + result
        num = quotient
    }
    
    return result
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    let chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
    var result = ""
    var num = x
    var remainder: Int
    var quotient: Int
    
    // Convert the number to base 'base'
    while num > 0 {
        remainder = num % base
        quotient = num / base
        result = String(chars[remainder]) + result
        num = quotient
    }
    
    return result
}

print(changeBase(x: 8, base: 3))  // "22"
print(changeBase(x: 8, base: 2))  // "1000"
print(changeBase(x: 7, base: 2))  // "111"
```
result = String(chars[remainder]) + result // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    var baseNum = base
    var remainderStack: [Int] = []
    
    while num > 0 {
        let remainder = num % base
        remainderStack.append(remainder)
        num /= base
    }
    
    while !remainderStack.isEmpty {
        let digit = remainderStack.popLast()
        result += String(digit)
    }
    
    return result
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    var baseNum = base
    var remainderStack: [Int] = []
    
    while num > 0 {
        let remainder = num % base
        remainderStack.append(remainder)
        num /= base
    }
    
    while !remainderStack.isEmpty {
        let digit = remainderStack.popLast()
        result += String(digit)
    }
    
    return result
}
```
result += String(digit) // no exact matches in call to initializer

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var baseNum = base
    var remainderArray: [Int] = []
    
    // Convert the number to base
    while number > 0 {
        let remainder = number % base
        remainderArray.append(remainder)
        number /= base
    }
    
    // Convert the base number to string
    while !remainderArray.isEmpty {
        let remainder = remainderArray.popLast()
        result += String(remainder)
    }
    
    return result
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var baseNum = base
    var remainderArray: [Int] = []
    
    // Convert the number to base
    while number > 0 {
        let remainder = number % base
        remainderArray.append(remainder)
        number /= base
    }
    
    // Convert the base number to string
    while !remainderArray.isEmpty {
        let remainder = remainderArray.popLast()
        result += String(remainder)
    }
    
    return result
}

print(changeBase(x: 8, base: 3)) // "22"
print(changeBase(x: 8, base: 2)) // "1000"
print(changeBase(x: 7, base: 2)) // "111"
```
result += String(remainder) // no exact matches in call to initializer

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var baseNum = base
    var isNegative = false
    
    if x < 0 {
        isNegative = true
        number = -number
    }
    
    var digits = [Int]()
    
    while number > 0 {
        digits.append(number % base)
        number /= base
    }
    
    digits.reverse()
    
    for digit in digits {
        if baseNum >= 10 {
            result += Character(digit.advancedDigitValue)
        } else {
            result += String(digit)
        }
    }
    
    if isNegative {
        result = "-" + result
    }
    
    return result
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var baseNum = base
    var isNegative = false
    
    if x < 0 {
        isNegative = true
        number = -number
    }
    
    var digits = [Int]()
    
    while number > 0 {
        digits.append(number % base)
        number /= base
    }
    
    digits.reverse()
    
    for digit in digits {
        if baseNum >= 10 {
            result += Character(digit.advancedDigitValue)
        } else {
            result += String(digit)
        }
    }
    
    if isNegative {
        result = "-" + result
    }
    
    return result
}
```
result += Character(digit.advancedDigitValue) // cannot convert value of type 'Character' to expected argument type 'String'
result += Character(digit.advancedDigitValue) // value of type 'Int' has no member 'advancedDigitValue'

func changeBase(x: Int, base: Int) -> String {
    let digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
    var num = x
    var result = ""
    var isNegative = false
    
    if x < 0 {
        isNegative = true
        num = -x
    }
    
    var temp = num
    var i = 0
    while temp > 0 {
        temp /= base
        i += 1
    }
    
    var arr = Array(repeating: 0, count: i)
    var j = i - 1
    
    while num > 0 {
        arr[j] = digits.index(num % base)!
        num /= base
        j -= 1
    }
    
    if isNegative {
        result += "-"
    }
    
    for i in 0..<arr.count {
        result += String(arr[i])
    }
    
    return result
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    let digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
    var num = x
    var result = ""
    var isNegative = false
    
    if x < 0 {
        isNegative = true
        num = -x
    }
    
    var temp = num
    var i = 0
    while temp > 0 {
        temp /= base
        i += 1
    }
    
    var arr = Array(repeating: 0, count: i)
    var j = i - 1
    
    while num > 0 {
        arr[j] = digits.index(num % base)!
        num /= base
        j -= 1
    }
    
    if isNegative {
        result += "-"
    }
    
    for i in 0..<arr.count {
        result += String(arr[i])
    }
    
    return result
}
```
arr[j] = digits.index(num % base)! // cannot assign value of type 'String.Index' to subscript of type 'Int'
arr[j] = digits.index(num % base)! // no exact matches in call to instance method 'index'

func changeBase(x: Int, base: Int) -> String {
    let chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
    var num = x
    var result = ""
    
    while num > 0 {
        let remainder = num % base
        result = String(chars[Int(String(remainder).last!)]!) + result
        num /= base
    }
    
    return result.isEmpty ? "0" : result
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    let chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
    var num = x
    var result = ""
    
    while num > 0 {
        let remainder = num % base
        result = String(chars[Int(String(remainder).last!)]!) + result
        num /= base
    }
    
    return result.isEmpty ? "0" : result
}

print(changeBase(x: 8, base: 3))  // "22"
print(changeBase(x: 8, base: 2))  // "1000"
print(changeBase(x: 7, base: 2))  // "111"
```
result = String(chars[Int(String(remainder).last!)]!) + result // no exact matches in call to initializer
result = String(chars[Int(String(remainder).last!)]!) + result // cannot force unwrap value of non-optional type 'Character'

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var baseNum = base
    var remainderArray: [Int] = []
    
    // Convert the number to base
    while number > 0 {
        let remainder = number % base
        remainderArray.append(remainder)
        number /= base
    }
    
    // Reverse the array to get the correct order of the digits
    while !remainderArray.isEmpty {
        result += String(remainderArray.removeLast())
    }
    
    return result
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var baseNum = base
    var remainderArray: [Int] = []
    
    // Convert the number to base
    while number > 0 {
        let remainder = number % base
        remainderArray.append(remainder)
        number /= base
    }
    
    // Reverse the array to get the correct order of the digits
    while !remainderArray.isEmpty {
        result += String(remainderArray.removeLast())
    }
    
    return result
}

print(changeBase(x: 8, base: 3)) // "22"
print(changeBase(x: 8, base: 2)) // "1000"
print(changeBase(x: 7, base: 2)) // "111"
```
var baseNum = base // initialization of variable 'baseNum' was never used; consider replacing with assignment to '_' or removing it

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    var baseNum = base
    var isNegative = false
    
    if num < 0 {
        num = -num
        isNegative = true
    }
    
    var digits = [Int]()
    
    while num > 0 {
        digits.append(num % base)
        num /= base
    }
    
    digits.reverse()
    
    for digit in digits {
        if baseNum < 10 {
            result += String(digit)
        } else {
            result += String(digit as? Int ?? 0)
        }
    }
    
    if isNegative {
        result = "-" + result
    }
    
    return result
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    var baseNum = base
    var isNegative = false
    
    if num < 0 {
        num = -num
        isNegative = true
    }
    
    var digits = [Int]()
    
    while num > 0 {
        digits.append(num % base)
        num /= base
    }
    
    digits.reverse()
    
    for digit in digits {
        if baseNum < 10 {
            result += String(digit)
        } else {
            result += String(digit as? Int ?? 0)
        }
    }
    
    if isNegative {
        result = "-" + result
    }
    
    return result
}
```
var baseNum = base // variable 'baseNum' was never mutated; consider changing to 'let' constant
result += String(digit as? Int ?? 0) // conditional cast from 'Int' to 'Int' always succeeds

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var baseNum = base
    var isNegative = false
    
    if x < 0 {
        isNegative = true
        number = -number
    }
    
    var digits = [Int]()
    
    while number > 0 {
        digits.append(number % baseNum)
        number /= baseNum
    }
    
    digits.reverse()
    
    for digit in digits {
        if baseNum > 10 && digit > 9 {
            result += String(digit + 55) // convert numbers 10-15 to A-F
        } else {
            result += String(digit)
        }
    }
    
    if isNegative {
        result = "-" + result
    }
    
    return result
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var baseNum = base
    var isNegative = false
    
    if x < 0 {
        isNegative = true
        number = -number
    }
    
    var digits = [Int]()
    
    while number > 0 {
        digits.append(number % baseNum)
        number /= baseNum
    }
    
    digits.reverse()
    
    for digit in digits {
        if baseNum > 10 && digit > 9 {
            result += String(digit + 55) // convert numbers 10-15 to A-F
        } else {
            result += String(digit)
        }
    }
    
    if isNegative {
        result = "-" + result
    }
    
    return result
}
```
var baseNum = base // variable 'baseNum' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = "\(x % base)" + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = "\(x % base)" + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder >= base {
        let digit = remainder % base
        result = String(digit) + result
        remainder /= base
    }
    result = String(remainder) + result
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder >= base {
        let digit = remainder % base
        result = String(digit) + result
        remainder /= base
    }
    result = String(remainder) + result
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = "\(x % base)" + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = "\(x % base)" + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        let remainder = x % base
        result = "\(remainder)" + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        let remainder = x % base
        result = "\(remainder)" + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    return String(x, radix: base)
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        let digit = remainder % base
        result = String(digit) + result
        remainder = remainder / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        let digit = remainder % base
        result = String(digit) + result
        remainder = remainder / base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = "\(x % base)" + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = "\(x % base)" + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = "\(x % base)" + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = "\(x % base)" + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = "\(num % base)" + result
        num /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = "\(num % base)" + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder >= base {
        let digit = remainder % base
        result = "\(digit)" + result
        remainder /= base
    }
    result = "\(remainder)" + result
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder >= base {
        let digit = remainder % base
        result = "\(digit)" + result
        remainder /= base
    }
    result = "\(remainder)" + result
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = "\(remainder % base)" + result
        remainder /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = "\(remainder % base)" + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = "\(num % base)" + result
        num /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = "\(num % base)" + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = "\(remainder % base)" + result
        remainder /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = "\(remainder % base)" + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = "\(num % base)" + result
        num /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = "\(num % base)" + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = "\(remainder % base)" + result
        remainder /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = "\(remainder % base)" + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = "\(remainder % base)" + result
        remainder /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = "\(remainder % base)" + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = "\(remainder % base)" + result
        remainder /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = "\(remainder % base)" + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    // TODO: Implement this function.
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    // TODO: Implement this function.
}
```
} // missing return in global function expected to return 'String'

func changeBase(x: Int, base: Int) -> String {
    // TODO: Your code here
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    // TODO: Your code here
}
```
} // missing return in global function expected to return 'String'

func changeBase(x: Int, base: Int) -> String {
    // TODO: Write your code here
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    // TODO: Write your code here
}
```
} // missing return in global function expected to return 'String'

func changeBase(x: Int, base: Int) -> String {
    // TODO: Write your code here.
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    // TODO: Write your code here.
}
```
} // missing return in global function expected to return 'String'

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = "\(x % base)" + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = "\(x % base)" + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    // TODO: implement this function
    return ""
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    // TODO: implement this function
    return ""
}
```
 // XCTAssertTrue failed

func changeBase(x: Int, base: Int) -> String {
    // TODO: implement
    return ""
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    // TODO: implement
    return ""
}
```
 // XCTAssertTrue failed

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    // Your code here.
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    // Your code here.
}
```
} // missing return in global function expected to return 'String'

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var digits = "0123456789ABCDEF"
    
    while number > 0 {
        result = String(digits[number % base]) + result
        number /= base
    }
    
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var digits = "0123456789ABCDEF"
    
    while number > 0 {
        result = String(digits[number % base]) + result
        number /= base
    }
    
    return result
}
```
var digits = "0123456789ABCDEF" // variable 'digits' was never mutated; consider changing to 'let' constant
result = String(digits[number % base]) + result // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    var power = 1
    while remainder > 0 {
        var digit = remainder % base
        if digit < 10 {
            result = String(UnicodeScalar(digit + 48)) + result
        } else {
            result = String(UnicodeScalar(digit + 87)) + result
        }
        remainder = remainder / base
        power = power * base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    var power = 1
    while remainder > 0 {
        var digit = remainder % base
        if digit < 10 {
            result = String(UnicodeScalar(digit + 48)) + result
        } else {
            result = String(UnicodeScalar(digit + 87)) + result
        }
        remainder = remainder / base
        power = power * base
    }
    return result
}
```
result = String(UnicodeScalar(digit + 48)) + result // value of optional type 'UnicodeScalar?' (aka 'Optional<Unicode.Scalar>') must be unwrapped to a value of type 'UnicodeScalar' (aka 'Unicode.Scalar')
result = String(UnicodeScalar(digit + 87)) + result // value of optional type 'UnicodeScalar?' (aka 'Optional<Unicode.Scalar>') must be unwrapped to a value of type 'UnicodeScalar' (aka 'Unicode.Scalar')

func changeBase(x: Int, base: Int) -> String {
    // TODO:
    // 1. convert x to string
    // 2. convert base to string
    // 3. replace x with base
    // 4. return x
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    // TODO:
    // 1. convert x to string
    // 2. convert base to string
    // 3. replace x with base
    // 4. return x
}
```
} // missing return in global function expected to return 'String'

func changeBase(x: Int, base: Int) -> String {
    // TODO:
    // return string representation after the conversion.
    // base numbers are less than 10.
    var result = ""
    var temp = x
    var i = 0
    while temp > 0 {
        var remainder = temp % base
        if remainder > 9 {
            remainder = remainder - 10
        }
        result = String(format: "%d%@", remainder, result)
        temp = temp / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    // TODO:
    // return string representation after the conversion.
    // base numbers are less than 10.
    var result = ""
    var temp = x
    var i = 0
    while temp > 0 {
        var remainder = temp % base
        if remainder > 9 {
            remainder = remainder - 10
        }
        result = String(format: "%d%@", remainder, result)
        temp = temp / base
    }
    return result
}
```
var i = 0 // initialization of variable 'i' was never used; consider replacing with assignment to '_' or removing it

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        let digit = remainder % base
        result = String(format: "%d%@", digit, result)
        remainder = remainder / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        let digit = remainder % base
        result = String(format: "%d%@", digit, result)
        remainder = remainder / base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var baseDigits = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9"]
    var baseDigits2 = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "A", "B", "C", "D", "E", "F"]
    
    while number > 0 {
        result = baseDigits[number % base] + result
        number /= base
    }
    
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var baseDigits = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9"]
    var baseDigits2 = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "A", "B", "C", "D", "E", "F"]
    
    while number > 0 {
        result = baseDigits[number % base] + result
        number /= base
    }
    
    return result
}
```
var baseDigits = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9"] // variable 'baseDigits' was never mutated; consider changing to 'let' constant
var baseDigits2 = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "A", "B", "C", "D", "E", "F"] // initialization of variable 'baseDigits2' was never used; consider replacing with assignment to '_' or removing it

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var temp = x
    var remainder = 0
    while temp > 0 {
        remainder = temp % base
        temp = temp / base
        result = String(format: "%d%@", remainder, result)
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var temp = x
    var remainder = 0
    while temp > 0 {
        remainder = temp % base
        temp = temp / base
        result = String(format: "%d%@", remainder, result)
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    var divider = 1
    
    while remainder > 0 {
        let digit = remainder % base
        remainder = remainder / base
        
        result = String(format: "%d%@", digit, result)
        divider = divider * 10
    }
    
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    var divider = 1
    
    while remainder > 0 {
        let digit = remainder % base
        remainder = remainder / base
        
        result = String(format: "%d%@", digit, result)
        divider = divider * 10
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var digit = 0
    while number > 0 {
        digit = number % base
        number = number / base
        result = String(format: "%d%@", digit, result)
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var digit = 0
    while number > 0 {
        digit = number % base
        number = number / base
        result = String(format: "%d%@", digit, result)
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    guard x >= 0, base > 0, base < 10 else {
        fatalError("Invalid input")
    }
    
    let digits = "0123456789"
    var result = ""
    var number = x
    
    while number!= 0 {
        let digitIndex = number % base
        result = String(digits[digitIndex]) + result
        number /= base
    }
    
    return result
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    guard x >= 0, base > 0, base < 10 else {
        fatalError("Invalid input")
    }
    
    let digits = "0123456789"
    var result = ""
    var number = x
    
    while number!= 0 {
        let digitIndex = number % base
        result = String(digits[digitIndex]) + result
        number /= base
    }
    
    return result
}
```
while number!= 0 { // use of '=' in a boolean context, did you mean '=='?
while number!= 0 { // '=' must have consistent whitespace on both sides
while number!= 0 { // cannot force unwrap value of non-optional type 'Int'
result = String(digits[digitIndex]) + result // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.

func changeBase(x: Int, base: Int) -> String {
    if x == 0 {
        return "0"
    }
    
    var result = ""
    var num = x
    
    while num > 0 {
        let rem = num % base
        num /= base
        
        if rem < 10 {
            result = "\(rem)" + result
        } else {
            let char = "ABCDEF"[(rem - 10)]
            result = "\(char)" + result
        }
    }
    
    return result
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    if x == 0 {
        return "0"
    }
    
    var result = ""
    var num = x
    
    while num > 0 {
        let rem = num % base
        num /= base
        
        if rem < 10 {
            result = "\(rem)" + result
        } else {
            let char = "ABCDEF"[(rem - 10)]
            result = "\(char)" + result
        }
    }
    
    return result
}

// Test cases
print(changeBase(x: 8, base: 3)) // Output: "22"
print(changeBase(x: 8, base: 2)) // Output: "1000"
print(changeBase(x: 7, base: 2)) // Output: "111"
```
let char = "ABCDEF"[(rem - 10)] // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.

func changeBase(x: Int, base: Int) -> String {
    guard base >= 2 && base < 10 else {
        fatalError("Base must be between 2 and 9")
    }
    
    let numberString = String(x, radix: base)
    
    return numberString
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    guard base >= 2 && base < 10 else {
        fatalError("Base must be between 2 and 9")
    }
    
    let numberString = String(x, radix: base)
    
    return numberString
}
```

func changeBase(x: Int, base: Int) -> String {
    if x < 0 {
        return "Invalid input. Number should be non-negative."
    }
    
    if base < 2 || base > 10 {
        return "Invalid base. Base should be between 2 and 10."
    }
    
    var result = ""
    var num = x
    
    while num > 0 {
        let rem = num % base
        result = "\(rem)" + result
        num /= base
    }
    
    return result
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    if x < 0 {
        return "Invalid input. Number should be non-negative."
    }
    
    if base < 2 || base > 10 {
        return "Invalid base. Base should be between 2 and 10."
    }
    
    var result = ""
    var num = x
    
    while num > 0 {
        let rem = num % base
        result = "\(rem)" + result
        num /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    if x < 0 {
        return "Invalid input. Number should be non-negative."
    }
    
    if base < 2 || base > 10 {
        return "Invalid base. Base should be between 2 and 10."
    }
    
    var result = ""
    var num = x
    
    while num > 0 {
        let rem = num % base
        result = "\(rem)" + result
        num /= base
    }
    
    return result
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    if x < 0 {
        return "Invalid input. Number should be non-negative."
    }
    
    if base < 2 || base > 10 {
        return "Invalid base. Base should be between 2 and 10."
    }
    
    var result = ""
    var num = x
    
    while num > 0 {
        let rem = num % base
        result = "\(rem)" + result
        num /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    if x < 0 {
        return "Invalid input. Number should be non-negative."
    }
    
    if base < 2 || base > 10 {
        return "Invalid base. Base should be between 2 and 10."
    }
    
    var result = ""
    var number = x
    
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    
    return result
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    if x < 0 {
        return "Invalid input. Number should be non-negative."
    }
    
    if base < 2 || base > 10 {
        return "Invalid base. Base should be between 2 and 10."
    }
    
    var result = ""
    var number = x
    
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    if x < 0 {
        return "Invalid input. Number should be non-negative."
    }
    
    if base < 2 || base > 10 {
        return "Invalid base. Base should be between 2 and 10."
    }
    
    var result = ""
    var num = x
    
    while num > 0 {
        let rem = num % base
        result = "\(rem)" + result
        num /= base
    }
    
    return result
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    if x < 0 {
        return "Invalid input. Number should be non-negative."
    }
    
    if base < 2 || base > 10 {
        return "Invalid base. Base should be between 2 and 10."
    }
    
    var result = ""
    var num = x
    
    while num > 0 {
        let rem = num % base
        result = "\(rem)" + result
        num /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    guard base >= 2 && base < 10 else {
        fatalError("Base must be between 2 and 9")
    }
    
    let numberString = String(x, radix: base)
    
    return numberString
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    guard base >= 2 && base < 10 else {
        fatalError("Base must be between 2 and 9")
    }
    
    let numberString = String(x, radix: base)
    
    return numberString
}
```

func changeBase(x: Int, base: Int) -> String {
    guard x >= 0, base > 0, base < 10 else {
        fatalError("Invalid input")
    }
    
    var result = ""
    var num = x
    
    while num > 0 {
        let rem = num % base
        result = String(rem) + result
        num /= base
    }
    
    return result
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    guard x >= 0, base > 0, base < 10 else {
        fatalError("Invalid input")
    }
    
    var result = ""
    var num = x
    
    while num > 0 {
        let rem = num % base
        result = String(rem) + result
        num /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    if x < 0 {
        return "Invalid input. Number should be non-negative."
    }
    
    if base < 2 || base > 10 {
        return "Invalid base. Base should be between 2 and 10."
    }
    
    var result = ""
    var num = x
    
    while num > 0 {
        let rem = num % base
        result = "\(rem)" + result
        num /= base
    }
    
    return result
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"<|im_end|>
<|im_start|>assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    if x < 0 {
        return "Invalid input. Number should be non-negative."
    }
    
    if base < 2 || base > 10 {
        return "Invalid base. Base should be between 2 and 10."
    }
    
    var result = ""
    var num = x
    
    while num > 0 {
        let rem = num % base
        result = "\(rem)" + result
        num /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}

func isPalindrome(x: Int) -> Bool {
    let str = String(x)
    let reversedStr = String(str.reversed())
    return str == reversedStr
}

func isPalindromeInBase(x: Int, base: Int) -> Bool {
    return isPalindrome(x: Int(changeBase(x: x, base: base)))
}

func isPalindromeInAnyBase(x: Int) -> Bool {
    for base in 2...9 {
        if isPalindromeInBase(x: x, base: base) {
            return true
        }
    }
    return false
}

func findSmallestPalindrome() -> Int {
    var x = 1
    while !isPalindromeInAnyBase(x: x) {
        x += 1
    }
    return x
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}

// Check if input number x is a palindrome.
// return true if x is palindrome, false otherwise.
// isPalindrome(x: 121) == true
// isPalindrome(x: 123) == false
func isPalindrome(x: Int) -> Bool {
    let str = String(x)
    let reversedStr = String(str.reversed())
    return str == reversedStr
}

// Check if input number x is a palindrome in base b.
// return true if x is palindrome in base b, false otherwise.
// isPalindromeInBase(x: 121, base: 10) == true
// isPalindromeInBase(x: 121, base: 2) == false
// isPalindromeInBase(x: 7, base: 2) == true
func isPalindromeInBase(x: Int, base: Int) -> Bool {
    return isPalindrome(x: Int(changeBase(x: x, base: base)))
}

// Check if input number x is a palindrome in any base.
// return true if x is palindrome in any base, false otherwise.
// isPalindromeInAnyBase(x: 121) == true
// isPalindromeInAnyBase(x: 7) == true
// isPalindromeInAnyBase(x: 123) == false
func isPalindromeInAnyBase(x: Int) -> Bool {
    for base in 2...9 {
        if isPalindromeInBase(x: x, base: base) {
            return true
        }
    }
    return false
}

// Find the smallest palindrome in any base greater than 1.
// return the smallest palindrome in any base.
// findSmallestPalindrome() == 1
func findSmallestPalindrome() -> Int {
    var x = 1
    while !isPalindromeInAnyBase(x: x) {
        x += 1
    }
    return x
}

// Find the smallest palindrome in any base greater than 1.
// return the smallest palindrome in any base.
// findSmallestPalindrome() == 1
func findSmallestPalindrome() -> Int {
    var x = 1
    while !isPalindromeInAnyBase(x: x) {
        x += 1
    }
    return x
}
```
return isPalindrome(x: Int(changeBase(x: x, base: base))) // value of optional type 'Int?' must be unwrapped to a value of type 'Int'

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}

func changeToBinary(x: Int) -> String {
    return changeBase(x: x, base: 2)
}

func changeToOctal(x: Int) -> String {
    return changeBase(x: x, base: 8)
}

func changeToHexadecimal(x: Int) -> String {
    return changeBase(x: x, base: 16)
}

func changeToDecimal(x: String) -> String {
    var result = 0
    for (i, c) in x.enumerated() {
        let value = Int(String(c))!
        result += value * Int(pow(Double(16), Double(x.count - i - 1)))
    }
    return String(result)
}

func changeToDecimal(x: String) -> String {
    var result = 0
    for (i, c) in x.enumerated() {
        let value = Int(String(c))!
        result += value * Int(pow(Double(8), Double(x.count - i - 1)))
    }
    return String(result)
}

func changeToDecimal(x: String) -> String {
    var result = 0
    for (i, c) in x.enumerated() {
        let value = Int(String(c))!
        result += value * Int(pow(Double(3), Double(x.count - i - 1)))
    }
    return String(result)
}

func changeToDecimal(x: String) -> String {
    var result = 0
    for (i, c) in x.enumerated() {
        let value = Int(String(c))!
        result += value * Int(pow(Double(2), Double(x.count - i - 1)))
    }
    return String(result)
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}

// Convert input number x to binary.
// return string representation after the conversion.
// changeToBinary(x: 8) == "1000"
// changeToBinary(x: 7) == "111"
func changeToBinary(x: Int) -> String {
    return changeBase(x: x, base: 2)
}

// Convert input number x to octal.
// return string representation after the conversion.
// changeToOctal(x: 8) == "10"
// changeToOctal(x: 7) == "7"
func changeToOctal(x: Int) -> String {
    return changeBase(x: x, base: 8)
}

// Convert input number x to hexadecimal.
// return string representation after the conversion.
// changeToHexadecimal(x: 8) == "8"
// changeToHexadecimal(x: 7) == "7"
func changeToHexadecimal(x: Int) -> String {
    return changeBase(x: x, base: 16)
}

// Convert input number x to decimal.
// return string representation after the conversion.
// changeToDecimal(x: "1000") == "8"
// changeToDecimal(x: "111") == "7"
func changeToDecimal(x: String) -> String {
    var result = 0
    for (i, c) in x.enumerated() {
        let value = Int(String(c))!
        result += value * Int(pow(Double(16), Double(x.count - i - 1)))
    }
    return String(result)
}

// Convert input number x to decimal.
// return string representation after the conversion.
// changeToDecimal(x: "10") == "8"
// changeToDecimal(x: "7") == "7"
func changeToDecimal(x: String) -> String {
    var result = 0
    for (i, c) in x.enumerated() {
        let value = Int(String(c))!
        result += value * Int(pow(Double(8), Double(x.count - i - 1)))
    }
    return String(result)
}

// Convert input number x to decimal.
// return string representation after the conversion.
// changeToDecimal(x: "22") == "8"
// changeToDecimal(x: "111") == "7"
func changeToDecimal(x: String) -> String {
    var result = 0
    for (i, c) in x.enumerated() {
        let value = Int(String(c))!
        result += value * Int(pow(Double(3), Double(x.count - i - 1)))
    }
    return String(result)
}

// Convert input number x to decimal.
// return string representation after the conversion.
// changeToDecimal(x: "22") == "8"
// changeToDecimal(x: "111") == "7"
func changeToDecimal(x: String) -> String {
    var result = 0
    for (i, c) in x.enumerated() {
        let value = Int(String(c))!
        result += value * Int(pow(Double(2), Double(x.count - i - 1)))
    }
    return String(result)
}

// Convert input number x to decimal.
// return string representation after the conversion.
// changeToDecimal(x: "22") == "8"
// changeToDecimal(x: "111") == "7"
func changeToDecimal(x: String) -> String {
    var result = 0
    for (i, c) in x.enumerated() {
        let value = Int(String(c))!
        result += value * Int(pow(Double(2), Double(x.count - i - 1)))
    }
    return String(result)
}

// Convert input number x to decimal.
// return string representation after the conversion.
// changeToDecimal(x: "22") == "8"
// changeToDecimal(x
func changeToDecimal(x: String) -> String { // invalid redeclaration of 'changeToDecimal(x:)'
func changeToDecimal(x: String) -> String { // invalid redeclaration of 'changeToDecimal(x:)'
func changeToDecimal(x: String) -> String { // invalid redeclaration of 'changeToDecimal(x:)'

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}

func isPalindrome(x: Int) -> Bool {
    let str = String(x)
    return str == String(str.reversed())
}

func isPalindromeInBase(x: Int, base: Int) -> Bool {
    return isPalindrome(x: Int(changeBase(x: x, base: base)))
}

func isPalindromeInAnyBase(x: Int) -> Bool {
    for base in 2...10 {
        if isPalindromeInBase(x: x, base: base) {
            return true
        }
    }
    return false
}

func findSmallestPalindrome(x: Int) -> Int {
    var x = x
    while !isPalindromeInAnyBase(x: x) {
        x += 1
    }
    return x
}

func findLargestPalindrome(x: Int) -> Int {
    var x = x
    while !isPalindromeInAnyBase(x: x) {
        x -= 1
    }
    return x
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}

// Check if input number x is a palindrome.
// return true if x is a palindrome, false otherwise.
// isPalindrome(x: 121) == true
// isPalindrome(x: 123) == false
func isPalindrome(x: Int) -> Bool {
    let str = String(x)
    return str == String(str.reversed())
}

// Check if input number x is a palindrome in base b.
// return true if x is a palindrome in base b, false otherwise.
// isPalindromeInBase(x: 121, base: 10) == true
// isPalindromeInBase(x: 121, base: 2) == false
// isPalindromeInBase(x: 7, base: 2) == true
func isPalindromeInBase(x: Int, base: Int) -> Bool {
    return isPalindrome(x: Int(changeBase(x: x, base: base)))
}

// Check if input number x is a palindrome in any base.
// return true if x is a palindrome in any base, false otherwise.
// isPalindromeInAnyBase(x: 121) == true
// isPalindromeInAnyBase(x: 7) == true
// isPalindromeInAnyBase(x: 123) == false
func isPalindromeInAnyBase(x: Int) -> Bool {
    for base in 2...10 {
        if isPalindromeInBase(x: x, base: base) {
            return true
        }
    }
    return false
}

// Find the smallest palindrome greater than or equal to x in any base.
// return the smallest palindrome greater than or equal to x in any base.
// findSmallestPalindrome(x: 121) == 121
// findSmallestPalindrome(x: 7) == 7
// findSmallestPalindrome(x: 123) == 131
func findSmallestPalindrome(x: Int) -> Int {
    var x = x
    while !isPalindromeInAnyBase(x: x) {
        x += 1
    }
    return x
}

// Find the largest palindrome less than or equal to x in any base.
// return the largest palindrome less than or equal to x in any base.
// findLargestPalindrome(x: 121) == 121
// findLargestPalindrome(x: 7) == 7
// findLargestPalindrome(x: 123) == 121
func findLargestPalindrome(x: Int) -> Int {
    var x = x
    while !isPalindromeInAnyBase(x: x) {
        x -= 1
    }
    return x
}
```
return isPalindrome(x: Int(changeBase(x: x, base: base))) // value of optional type 'Int?' must be unwrapped to a value of type 'Int'

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    return result
}

// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}

func decodeWays(s: String) -> Int {
    var dp = [Int](repeating: 0, count: s.count + 1)
    dp[0] = 1
    dp[1] = s[0] == "0" ? 0 : 1
    for i in 2...s.count {
        let first = Int(String(s[i-1]))!
        let second = Int(String(s[i-2]))!
        if first != 0 {
            dp[i] += dp[i-1]
        }
        if second != 0 && second <= 26 {
            dp[i] += dp[i-2]
        }
    }
    return dp[s.count]
}

func palindromePartition(s: String) -> [[String]] {
    var result = [[String]]()
    var path = [String]()
    func backtrack(start: Int) {
        if start == s.count {
            result.append(path)
            return
        }
        for i in start..<s.count {
            let substring = s[start...i]
            if isPalindrome(substring) {
                path.append(String(substring))
                backtrack(start: i + 1)
                path.removeLast()
            }
        }
    }
    backtrack(start: 0)
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}

// Given a string of digits, return the number of ways to decode it.
// A message containing letters from A-Z is being encoded to numbers using the following mapping:
// 'A' -> 1
// 'B' -> 2
// ...
// 'Z' -> 26
// Given an encoded message containing digits, determine the total number of ways to decode it.
// decodeWays(s: "12") == 2
// decodeWays(s: "226") == 3
// decodeWays(s: "0") == 0
// decodeWays(s: "06") == 0
func decodeWays(s: String) -> Int {
    var dp = [Int](repeating: 0, count: s.count + 1)
    dp[0] = 1
    dp[1] = s[0] == "0" ? 0 : 1
    for i in 2...s.count {
        let first = Int(String(s[i-1]))!
        let second = Int(String(s[i-2]))!
        if first != 0 {
            dp[i] += dp[i-1]
        }
        if second != 0 && second <= 26 {
            dp[i] += dp[i-2]
        }
    }
    return dp[s.count]
}

// Given a string s, partition s such that every substring of the partition is a palindrome.
// Return all possible palindrome partitioning of s.
// palindromePartition(s: "aab") == [["a","a","b"], ["aa","b"]]
// palindromePartition(s: "a") == [["a"]]
func palindromePartition(s: String) -> [[String]] {
    var result = [[String]]()
    var path = [String]()
    func backtrack(start: Int) {
        if start == s.count {
            result.append(path)
            return
        }
        for i in start..<s.count {
            let substring = s[start...i]
            if isPalindrome(substring) {
                path.append(String(substring))
                backtrack(start: i + 1)
                path.removeLast()
            }
        }
    }
    backtrack(start: 0)
    return result
}

// Given a string s, partition s such that every substring of the partition is a palindrome.
// Return all possible palindrome partitioning of s.
// palindromePartition(s: "aab") == [["a","a","b"], ["aa","b"]]
// palindromePartition(s: "a") == [["a"]]
func palindromePartition(s: String) -> [[String]] {
    var result = [[String]]()
    var path = [String]()
    func backtrack(start: Int) {
        if start == s.count {
            result.append(path)
            return
        }
        for i in start..<s.count {
            let substring = s[start...i]
            if isPalindrome(substring) {
                path.append(String(substring))
                backtrack(start: i + 1)
                path.removeLast()
            }
        }
    }
    backtrack(start: 0)
    return result
}

// Given a string s, partition s such that every substring of the partition is a palindrome.
// Return all possible palindrome partitioning of s.
// palindromePartition(s: "aab") == [["a","a","b"], ["aa","b"]]
// palindromePartition(s: "a") == [["a"]]
func palindromePartition(s: String) -> [[String]] {
    var result = [[String]]()
    var path = [String]()
    func backtrack(start: Int) {
        if start == s.count {
            result.append(path)
            return
        }
        
dp[1] = s[0] == "0" ? 0 : 1 // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.
let first = Int(String(s[i-1]))! // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.
let second = Int(String(s[i-2]))! // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.
let substring = s[start...i] // 'subscript(_:)' is unavailable: cannot subscript String with an integer range, use a String.Index range instead.
if isPalindrome(substring) { // cannot find 'isPalindrome' in scope

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}

func changeBase(x: Int, base: Int) -> Int {
    var x = x
    var result = 0
    var power = 1
    while x > 0 {
        result += (x % base) * power
        x /= base
        power *= 10
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}

// Change numerical base of input number x to base.
// return integer representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == 22
// changeBase(x: 8, base: 2) == 1000
// changeBase(x: 7, base: 2) == 111
func changeBase(x: Int, base: Int) -> Int {
    var x = x
    var result = 0
    var power = 1
    while x > 0 {
        result += (x % base) * power
        x /= base
        power *= 10
    }
    return result
}

// Change numerical base of input number x to base.
// return integer representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == 22
// changeBase(x: 8, base: 2) == 1000
// changeBase(x: 7, base: 2) == 111
func changeBase(x: Int, base: Int) -> Int {
    var x = x
    var result = 0
    var power = 1
    while x > 0 {
        result += (x % base) * power
        x /= base
        power *= 10
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result.isEmpty ? "0" : result
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result.isEmpty ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result == "" ? "0" : result
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result == "" ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result.isEmpty ? "0" : result
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result.isEmpty ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result.isEmpty ? "0" : result
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result.isEmpty ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result.isEmpty ? "0" : result
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result.isEmpty ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result.isEmpty ? "0" : result
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result.isEmpty ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result == "" ? "0" : result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result == "" ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result == "" ? "0" : result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result == "" ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var number = x
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    return result == "" ? "0" : result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var number = x
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    return result == "" ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var number = x
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    return result == "" ? "0" : result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var number = x
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    return result == "" ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result == "" ? "0" : result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result == "" ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    var digits = "0123456789ABCDEF"
    
    while x > 0 {
        result = String(digits[x % base]) + result
        x /= base
    }
    
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    var digits = "0123456789ABCDEF"
    
    while x > 0 {
        result = String(digits[x % base]) + result
        x /= base
    }
    
    return result
}
```
var digits = "0123456789ABCDEF" // variable 'digits' was never mutated; consider changing to 'let' constant
result = String(digits[x % base]) + result // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    var digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
    
    while x > 0 {
        let remainder = x % base
        result = String(digits[remainder]) + result
        x /= base
    }
    
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    var digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
    
    while x > 0 {
        let remainder = x % base
        result = String(digits[remainder]) + result
        x /= base
    }
    
    return result
}
```
var digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ" // variable 'digits' was never mutated; consider changing to 'let' constant
result = String(digits[remainder]) + result // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    var digits = "0123456789ABCDEF"
    
    while x > 0 {
        result = String(digits[x % base]) + result
        x /= base
    }
    
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    var digits = "0123456789ABCDEF"
    
    while x > 0 {
        result = String(digits[x % base]) + result
        x /= base
    }
    
    return result
}
```
var digits = "0123456789ABCDEF" // variable 'digits' was never mutated; consider changing to 'let' constant
result = String(digits[x % base]) + result // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    var digits = "0123456789ABCDEF"
    
    while x > 0 {
        result = String(digits[x % base]) + result
        x /= base
    }
    
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    var digits = "0123456789ABCDEF"
    
    while x > 0 {
        result = String(digits[x % base]) + result
        x /= base
    }
    
    return result
}
```
var digits = "0123456789ABCDEF" // variable 'digits' was never mutated; consider changing to 'let' constant
result = String(digits[x % base]) + result // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    var digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
    
    while x > 0 {
        let remainder = x % base
        result = String(digits[remainder]) + result
        x /= base
    }
    
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    var digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
    
    while x > 0 {
        let remainder = x % base
        result = String(digits[remainder]) + result
        x /= base
    }
    
    return result
}
```
var digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ" // variable 'digits' was never mutated; consider changing to 'let' constant
result = String(digits[remainder]) + result // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    var digits = "0123456789ABCDEF"
    
    while x > 0 {
        result = String(digits[x % base]) + result
        x /= base
    }
    
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    var digits = "0123456789ABCDEF"
    
    while x > 0 {
        result = String(digits[x % base]) + result
        x /= base
    }
    
    return result
}
```
var digits = "0123456789ABCDEF" // variable 'digits' was never mutated; consider changing to 'let' constant
result = String(digits[x % base]) + result // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    var digits = "0123456789ABCDEF"
    
    while x > 0 {
        result = String(digits[x % base]) + result
        x /= base
    }
    
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    var digits = "0123456789ABCDEF"
    
    while x > 0 {
        result = String(digits[x % base]) + result
        x /= base
    }
    
    return result
}
```
var digits = "0123456789ABCDEF" // variable 'digits' was never mutated; consider changing to 'let' constant
result = String(digits[x % base]) + result // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    var digits = "0123456789ABCDEF"
    
    while x > 0 {
        let remainder = x % base
        result = String(digits[remainder]) + result
        x /= base
    }
    
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    var digits = "0123456789ABCDEF"
    
    while x > 0 {
        let remainder = x % base
        result = String(digits[remainder]) + result
        x /= base
    }
    
    return result
}
```
var digits = "0123456789ABCDEF" // variable 'digits' was never mutated; consider changing to 'let' constant
result = String(digits[remainder]) + result // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    var digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
    
    while x > 0 {
        result = String(digits[x % base]) + result
        x /= base
    }
    
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    var digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
    
    while x > 0 {
        result = String(digits[x % base]) + result
        x /= base
    }
    
    return result
}
```
var digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ" // variable 'digits' was never mutated; consider changing to 'let' constant
result = String(digits[x % base]) + result // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    let digits = "0123456789"
    
    while x > 0 {
        result = digits[x % base] + result
        x /= base
    }
    
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    let digits = "0123456789"
    
    while x > 0 {
        result = digits[x % base] + result
        x /= base
    }
    
    return result
}
```
result = digits[x % base] + result // no exact matches in call to subscript

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    let digits = "0123456789"
    
    while x > 0 {
        result = digits[x % base] + result
        x /= base
    }
    
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    let digits = "0123456789"
    
    while x > 0 {
        result = digits[x % base] + result
        x /= base
    }
    
    return result
}
```
result = digits[x % base] + result // no exact matches in call to subscript

func changeBase(x: Int, base: Int) -> String {
    let digits = "0123456789"
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = digits[remainder] + result
        number /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    let digits = "0123456789"
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = digits[remainder] + result
        number /= base
    }
    return result
}
```
result = digits[remainder] + result // no exact matches in call to subscript

func changeBase(x: Int, base: Int) -> String {
    let digits = "0123456789"
    var result = ""
    var number = x
    while number > 0 {
        result = digits[number % base] + result
        number /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    let digits = "0123456789"
    var result = ""
    var number = x
    while number > 0 {
        result = digits[number % base] + result
        number /= base
    }
    return result
}
```
result = digits[number % base] + result // no exact matches in call to subscript

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    let digits = "0123456789"
    
    while x > 0 {
        result = digits[x % base] + result
        x /= base
    }
    
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    let digits = "0123456789"
    
    while x > 0 {
        result = digits[x % base] + result
        x /= base
    }
    
    return result
}
```
result = digits[x % base] + result // no exact matches in call to subscript

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"

Answer:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var num = x
    var result = ""
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num /= base
    }
    return result
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var num = x
    var result = ""
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""

    while number > 0 {
        result = String(number % base) + result
        number /= base
    }

    return result
}
[INST]  Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"[/INST]  ```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""

    while number > 0 {
        result = String(number % base) + result
        number /= base
    }

    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""

    while number > 0 {
        result = String(number % base) + result
        number /= base
    }

    return result
}
[INST]  Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"[/INST]  ```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""

    while number > 0 {
        result = String(number % base) + result
        number /= base
    }

    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    return result
}
[INST]  Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"[/INST]  ```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    return result
}
[INST]  Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"[/INST]  ```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""

    while number > 0 {
        let remainder = number % base
        number /= base
        result = String(remainder) + result
    }

    return result
}
[INST]  Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"[/INST]  ```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""

    while number > 0 {
        let remainder = number % base
        number /= base
        result = String(remainder) + result
    }

    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""

    while number > 0 {
        result = String(number % base) + result
        number /= base
    }

    return result
}
[INST]  Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"[/INST]  ```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""

    while number > 0 {
        result = String(number % base) + result
        number /= base
    }

    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""

    while number > 0 {
        result = String(number % base) + result
        number /= base
    }

    return result
}
[INST]  Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"[/INST]  ```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""

    while number > 0 {
        result = String(number % base) + result
        number /= base
    }

    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""

    while number > 0 {
        result = String(number % base) + result
        number /= base
    }

    return result
}
[INST]  Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"[/INST]  ```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""

    while number > 0 {
        result = String(number % base) + result
        number /= base
    }

    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    return result
}
[INST]  Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"[/INST]  ```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""

    while number > 0 {
        result = String(number % base) + result
        number /= base
    }

    return result
}
[INST]  Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"[/INST]  ```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""

    while number > 0 {
        result = String(number % base) + result
        number /= base
    }

    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result.isEmpty ? "0" : result
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result.isEmpty ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result.isEmpty ? "0" : result
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result.isEmpty ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result.isEmpty ? "0" : result
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result.isEmpty ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result == "" ? "0" : result
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result == "" ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result.isEmpty ? "0" : result
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result.isEmpty ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result.isEmpty ? "0" : result
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result.isEmpty ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result == "" ? "0" : result
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result == "" ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    
    return result.isEmpty ? "0" : result
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    
    return result.isEmpty ? "0" : result
}

print(changeBase(x: 8, base: 3)) // "22"
print(changeBase(x: 8, base: 2)) // "1000"
print(changeBase(x: 7, base: 2)) // "111"
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result == "" ? "0" : result
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result == "" ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result == "" ? "0" : result
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result == "" ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var num = x
    var result = ""
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
Here is the Swift function to convert a number from base 10 to another base:

```swift
func changeBase(x: Int, base: Int) -> String {
    var num = x
    var result = ""
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""

    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }

    return result.isEmpty ? "0" : result
}
Here is the Swift function to convert a number to a different base:

```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""

    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }

    return result.isEmpty ? "0" : result
}

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    return result
}
Here is the Swift function to change the numerical base of an input number:

```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var num = x
    var result = ""
    
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    
    return result
}
Here is the Swift function to convert a number from base 10 to another base:

```swift
func changeBase(x: Int, base: Int) -> String {
    var num = x
    var result = ""
    
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    
    return result
}

func changeBase(x: Int, base: Int) -> String {
    var num = x
    var result = ""
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
Here is the Swift code for changing the base of a number:

```swift
func changeBase(x: Int, base: Int) -> String {
    var num = x
    var result = ""
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""

    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }

    return result.isEmpty ? "0" : result
}
Here is the Swift function to convert a number to a different base:

```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""

    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }

    return result.isEmpty ? "0" : result
}

func changeBase(x: Int, base: Int) -> String {
    var num = x
    var result = ""
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
Here is the Swift function that converts a number from base 10 to another base:

```swift
func changeBase(x: Int, base: Int) -> String {
    var num = x
    var result = ""
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
Here is the Swift function to convert a number to a different base:

```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var num = x
    var result = ""
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
Here is the Swift function to change the base of a number:

```swift
func changeBase(x: Int, base: Int) -> String {
    var num = x
    var result = ""
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}

func changeBase(x: Int, base: Int) -> String {
    var num = x
    var result = ""
    
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    
    return result
}
Here is the Swift code for changing the numerical base of an input number:

```swift
func changeBase(x: Int, base: Int) -> String {
    var num = x
    var result = ""
    
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    
    return result
}

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    
    return result.isEmpty ? "0" : result
}
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    
    return result.isEmpty ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    
    return result.isEmpty ? "0" : result
}
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    
    return result.isEmpty ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    
    while number > 0 {
        result = "\(number % base)" + result
        number /= base
    }
    
    return result.isEmpty ? "0" : result
}
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    
    while number > 0 {
        result = "\(number % base)" + result
        number /= base
    }
    
    return result.isEmpty ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    
    return result.isEmpty ? "0" : result
}
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    
    return result.isEmpty ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    
    return result.isEmpty ? "0" : result
}
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    
    return result.isEmpty ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    
    while number > 0 {
        result = "\(number % base)" + result
        number /= base
    }
    
    return result.isEmpty ? "0" : result
}
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    
    while number > 0 {
        result = "\(number % base)" + result
        number /= base
    }
    
    return result.isEmpty ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    
    return result.isEmpty ? "0" : result
}
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    
    return result.isEmpty ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    
    return result.isEmpty ? "0" : result
}
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    
    return result.isEmpty ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    
    return result.isEmpty ? "0" : result
}
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    
    return result.isEmpty ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    
    return result.isEmpty ? "0" : result
}
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    
    return result.isEmpty ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return "Base must be between 2 and 9"
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    } while number > 0
    
    return result
}
```swift
func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return "Base must be between 2 and 9"
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    } while number > 0
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return "Invalid base"
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    } while number > 0
    
    return result
}
```swift
func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return "Invalid base"
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    } while number > 0
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return "Base must be between 2 and 9"
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    } while number > 0
    
    return result
}
```swift
func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return "Base must be between 2 and 9"
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    } while number > 0
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return "Base must be between 2 and 9"
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    } while number > 0
    
    return result
}
```swift
func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return "Base must be between 2 and 9"
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    } while number > 0
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return "Base must be between 2 and 9"
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    } while number > 0
    
    return result
}
```swift
func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return "Base must be between 2 and 9"
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    } while number > 0
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return "Invalid base"
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    } while number > 0
    
    return result
}
```swift
func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return "Invalid base"
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    } while number > 0
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return "Base must be between 2 and 9"
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    } while number > 0
    
    return result
}
```swift
func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return "Base must be between 2 and 9"
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    } while number > 0
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return "Base must be between 2 and 9"
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    } while number > 0
    
    return result
}
```swift
func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return "Base must be between 2 and 9"
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    } while number > 0
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return "Invalid base"
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    } while number > 0
    
    return result
}
```swift
func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return "Invalid base"
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    } while number > 0
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return "Base must be between 2 and 9"
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    } while number > 0
    
    return result
}
```swift
func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return "Base must be between 2 and 9"
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    } while number > 0
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return ""
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    } while number > 0
    
    return result
}
```swift
func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return ""
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    } while number > 0
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return ""
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    } while number > 0
    
    return result
}
```swift
func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return ""
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    } while number > 0
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return ""
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    } while number > 0
    
    return result
}
```swift
func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return ""
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    } while number > 0
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return ""
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    } while number > 0
    
    return result
}
```swift
func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return ""
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    } while number > 0
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return ""
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    } while number > 0
    
    return result
}
```swift
func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return ""
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    } while number > 0
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return ""
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    } while number > 0
    
    return result
}
```swift
func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return ""
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    } while number > 0
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return ""
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    } while number > 0
    
    return result
}
```swift
func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return ""
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    } while number > 0
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return ""
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    } while number > 0
    
    return result
}
```swift
func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return ""
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    } while number > 0
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return ""
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    } while number > 0
    
    return result
}
```swift
func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return ""
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    } while number > 0
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return ""
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    } while number > 0
    
    return result
}
```swift
func changeBase(x: Int, base: Int) -> String {
    guard base > 1 && base < 10 else {
        return ""
    }
    
    var number = x
    var result = ""
    
    repeat {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    } while number > 0
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num /= base
    }
    
    return result
}
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num /= base
    }
    
    return result
}

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num /= base
    }
    
    return result
}
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num /= base
    }
    
    return result
}

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num = num / base
    }
    
    return result
}
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num = num / base
    }
    
    return result
}

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num /= base
    }
    
    return result
}
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num /= base
    }
    
    return result
}

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num /= base
    }
    
    return result
}
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num /= base
    }
    
    return result
}

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num /= base
    }
    
    return result
}
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num /= base
    }
    
    return result
}

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num = num / base
    }
    
    return result
}
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num = num / base
    }
    
    return result
}

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num /= base
    }
    
    return result
}
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num /= base
    }
    
    return result
}

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num /= base
    }
    
    return result
}
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num /= base
    }
    
    return result
}

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num /= base
    }
    
    return result
}
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num /= base
    }
    
    return result
}

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = "\(remainder)" + result
        number = number / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = "\(remainder)" + result
        number = number / base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = "\(remainder)" + result
        number = number / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = "\(remainder)" + result
        number = number / base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = "\(remainder)" + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = "\(remainder)" + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = "\(remainder)" + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        number = number / base
        result = "\(remainder)\(result)"
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        number = number / base
        result = "\(remainder)\(result)"
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var divider = base
    while number > 0 {
        let remainder = number % divider
        result = "\(remainder)" + result
        number = number / divider
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var divider = base
    while number > 0 {
        let remainder = number % divider
        result = "\(remainder)" + result
        number = number / divider
    }
    return result
}
```
var divider = base // variable 'divider' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        result = String(number % base) + result
        number = number / base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        result = String(number % base) + result
        number = number / base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var baseNumber = base
    while number > 0 {
        let remainder = number % baseNumber
        number = number / baseNumber
        result = "\(remainder)" + result
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var baseNumber = base
    while number > 0 {
        let remainder = number % baseNumber
        number = number / baseNumber
        result = "\(remainder)" + result
    }
    return result
}
```
var baseNumber = base // variable 'baseNumber' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var baseNum = base
    while number > 0 {
        let remainder = number % baseNum
        number = number / baseNum
        result = "\(remainder)" + result
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var baseNum = base
    while number > 0 {
        let remainder = number % baseNum
        number = number / baseNum
        result = "\(remainder)" + result
    }
    return result
}
```
var baseNum = base // variable 'baseNum' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        result = "\(number % base)" + result
        number /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        result = "\(number % base)" + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        result = String(number % base) + result
        number = number / base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        result = String(number % base) + result
        number = number / base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x = x / base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x = x / base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num = num / base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num = num / base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x = x / base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x = x / base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num = num / base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num = num / base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x = x / base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x = x / base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var num = x
    var result = ""
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num = num / base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var num = x
    var result = ""
    while num > 0 {
        let remainder = num % base
        result = String(remainder) + result
        num = num / base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x = x / base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x = x / base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    // write your code here
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    // write your code here
}
} // missing return in global function expected to return 'String'

func changeBase(x: Int, base: Int) -> String {
    // write your code here
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    // write your code here
}
} // missing return in global function expected to return 'String'

func changeBase(x: Int, base: Int) -> String {
    // write your code here
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    // write your code here
}
} // missing return in global function expected to return 'String'

func changeBase(x: Int, base: Int) -> String {
    // write your code here
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    // write your code here
}
} // missing return in global function expected to return 'String'

func changeBase(x: Int, base: Int) -> String {
    // write your code here
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    // write your code here
}
} // missing return in global function expected to return 'String'

func changeBase(x: Int, base: Int) -> String {
    // write your code here
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    // write your code here
}
} // missing return in global function expected to return 'String'

func changeBase(x: Int, base: Int) -> String {
    // write your code here
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    // write your code here
}
} // missing return in global function expected to return 'String'

func changeBase(x: Int, base: Int) -> String {
    return ""
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    return ""
}
```
 // XCTAssertTrue failed

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    let digits = "0123
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    let digits = "0123
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var base = base
    while number > 0 {
        let digit = number % base
        number /= base
        result = String(digit) + result
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var base = base
    while number > 0 {
        let digit = number % base
        number /= base
        result = String(digit) + result
    }
    return result
}
```
var base = base // variable 'base' was never mutated; consider changing to 'let' constant

```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var base = base
    if base < 10 {
        while number > 0 {
            result.append(String(Character(UnicodeScalar(number % base + Character("0").unicode
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

func changeBase(x: Int, base: Int) -> String {
    var res = ""
    var num = x
    while num > 0 {
        res.insert(String(num % base), at: res.startIndex)
        num /= base
    }
    return res
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var res = ""
    var num = x
    while num > 0 {
        res.insert(String(num % base), at: res.startIndex)
        num /= base
    }
    return res
}
```
res.insert(String(num % base), at: res.startIndex) // no exact matches in call to instance method 'insert'

```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var num = x
    var res = ""
    var baseArr = Array(repeating: "", count: base)
    baseArr[0] = "0123456789ABCDEF"
    while num > 0 {
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var base = base
    
    if base < 10 {
        while number > 0 {
            result.append("\(number % base)")
            number /= base
        }
        return result
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var base = base
    while number > 0 {
        result.insert(String(Character(UnicodeScalar(number % base + Character("0").unicodeScalarValue)!)), at: result
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

func changeBase(x: Int, base: Int) -> String {
    var num = x
    var result = ""
    var baseNum = 0
    while num > 0 {
        baseNum = num % base
        num /= base
        result = String(baseNum) + result
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var num = x
    var result = ""
    var baseNum = 0
    while num > 0 {
        baseNum = num % base
        num /= base
        result = String(baseNum) + result
    }
    return result
}

```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var base = base
    while number > 0 {
        result.insert(String(Character(UnicodeScalar(number % base + Character("0").unicodeScalarValue)!)), at: result
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var num = x
    var res = ""
    var baseArr = [Int]()
    for i in 0..<base {
        baseArr.append(Int(pow(Double(base), Double(i))) % 10)
    }
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        result.insert(String(Character(UnicodeScalar(number % base + Character("0").unicodeScalarValue)!)), at: result.startIndex)
        
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}

func changeBase(x: Int, base: Int) -> String {
    guard base >= 2 && base <= 10 else {
        return "Base must be between 2 and 10"
    }
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}

func changeBase(x: Int, base: Int) -> String {
    guard base >= 2 && base <= 10 else {
        return "Base must be between 2 and 10"
    }
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}

func changeBase(x: Int, base: Int) -> String {
    guard base >= 2 && base <= 10 else {
        return "Base must be between 2 and 10"
    }
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}

func changeBase(x: Int, base: Int) -> String {
    guard base >= 2 && base <= 10 else {
        return "Base must be between 2 and 10"
    }
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}

func changeBase(x: Int, base: Int) -> String {
    guard base >= 2 && base <= 10 else {
        return "Base must be between 2 and 10"
    }
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}

func changeBase(x: Int, base: Int) -> String {
    guard base >= 2 && base <= 10 else {
        return "Base must be between 2 and 10"
    }
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}

func changeBase(x: Int, base: Int) -> String {
    guard base >= 2 && base <= 10 else {
        return "Base must be between 2 and 10"
    }
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}

func changeBase(x: Int, base: Int) -> String {
    guard base >= 2 && base <= 10 else {
        return "Base must be between 2 and 10"
    }
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}

func changeBase(x: Int, base: Int) -> String {
    guard base >= 2 && base <= 10 else {
        return "Base must be between 2 and 10"
    }
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}

func changeBase(x: Int, base: Int) -> String {
    guard base >= 2 && base <= 10 else {
        return "Base must be between 2 and 10"
    }
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}

func changeBase(x: Int, base: Int) -> String {
    guard base >= 2 && base <= 10 else {
        return "Base must be between 2 and 10"
    }
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}

func changeBase(x: Int, base: Int) -> String {
    guard base >= 2 && base <= 1
func changeBase(x: Int, base: Int) -> String { // invalid redeclaration of 'changeBase(x:base:)'

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}

func testChangeBase() {
    print(changeBase(x: 8, base: 3))  // expected output: "22"
    print(changeBase(x: 8, base: 2))  // expected output: "1000"
    print(changeBase(x: 7, base: 2))  // expected output: "111"
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}

func testChangeBase() {
    print(changeBase(x: 8, base: 3))  // expected output: "22"
    print(changeBase(x: 8, base: 2))  // expected output: "1000"
    print(changeBase(x: 7, base: 2))  // expected output: "111"
}

testChangeBase()
``````

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    
    return result
}

changeBase(x: 8, base: 3)
changeBase(x: 8, base: 2)
changeBase(x: 7, base: 2)
``````
```python
def change_base(x, base):
    result = ""
    number = x

    while number > 0:
        result = str(number % base) + result
        number //= base

    return result

change_base(8, 3), change_base(8, 2), change_base(7, 2)
```

func changeBase(x: Int, base: Int) -> String {
    guard base >= 2 else { return String(x) }
    var result = ""
    var n = x
    while n > 0 {
        result = String(n % base) + result
        n /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    guard base >= 2 else { return String(x) }
    var result = ""
    var n = x
    while n > 0 {
        result = String(n % base) + result
        n /= base
    }
    return result
}
`````````swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    guard base >= 2 else { return String(x) }
    var result = ""
    var n = x
    while n > 0 {
        result = String(n % base) + result
        n /= base
    }
    return result
}

// Test cases
print(changeBase(x: 8, base: 3))  // Output: "22"
print(changeBase(x: 8, base: 2))  // Output: "1000"
print(changeBase(x: 7, base: 2))  // Output: "111"
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    
    return result
}

changeBase(x: 8, base: 3)
changeBase(x: 8, base: 2)
changeBase(x: 7, base: 2)
``````

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    
    return result
}

changeBase(x: 8, base: 3)
changeBase(x: 8, base: 2)
changeBase(x: 7, base: 2)
``````

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    
    return result
}

changeBase(x: 8, base: 3)
changeBase(x: 8, base: 2)
changeBase(x: 7, base: 2)
``````

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    return result
}

changeBase(x: 8, base: 3)
changeBase(x: 8, base: 2)
changeBase(x: 7, base: 2)
``````

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}

changeBase(x: 8, base: 3)
changeBase(x: 8, base: 2)
changeBase(x: 7, base: 2)
``````
```python
def change_base(x, base):
    result = ""
    num = x
    while num > 0:
        result = str(num % base) + result
        num //= base
    return result

change_base(8, 3), change_base(8, 2), change_base(7, 2)
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    
    return result
}

changeBase(x: 8, base: 3)
changeBase(x: 8, base: 2)
changeBase(x: 7, base: 2)
``````

func changeBase(x: Int, base: Int) -> String {
    var num = x
    var res = ""
    var baseNum = 0
    while num > 0 {
        baseNum = num % base
        num /= base
        res = "\(baseNum)" + res
    }
    return res
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var num = x
    var res = ""
    var baseNum = 0
    while num > 0 {
        baseNum = num % base
        num /= base
        res = "\(baseNum)" + res
    }
    return res
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var base = base
    while number > 0 {
        result = String(Character(UnicodeScalar(Int(number % base) + 48)!)) + result
        number /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var base = base
    while number > 0 {
        result = String(Character(UnicodeScalar(Int(number % base) + 48)!)) + result
        number /= base
    }
    return result
}
```
var base = base // variable 'base' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var num = x
    var res = ""
    var baseStr = ""
    for i in 0..<base {
        baseStr.append("\(i)")
    }
    while num > 0 {
        let temp = num % base
        res.insert(baseStr[temp], at: res.startIndex)
        num /= base
    }
    return res
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var num = x
    var res = ""
    var baseStr = ""
    for i in 0..<base {
        baseStr.append("\(i)")
    }
    while num > 0 {
        let temp = num % base
        res.insert(baseStr[temp], at: res.startIndex)
        num /= base
    }
    return res
}
```
res.insert(baseStr[temp], at: res.startIndex) // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var baseNumber = 1
    while number > 0 {
        let digit = number % base
        number /= base
        result = String(digit) + result
        baseNumber *= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    var baseNumber = 1
    while number > 0 {
        let digit = number % base
        number /= base
        result = String(digit) + result
        baseNumber *= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var num = x
    var res = ""
    var baseStr = ""
    for _ in 0..<base {
        baseStr.append("0")
    }
    while num > 0 {
        let digit = num % base
        num /= base
        res = String(digit) + res
    }
    return res.prefix(base) == baseStr ? res : (baseStr + res)
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var num = x
    var res = ""
    var baseStr = ""
    for _ in 0..<base {
        baseStr.append("0")
    }
    while num > 0 {
        let digit = num % base
        num /= base
        res = String(digit) + res
    }
    return res.prefix(base) == baseStr ? res : (baseStr + res)
}
```
 // XCTAssertTrue failed

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    var base = base
    while num > 0 {
        let mod = num % base
        result = String(mod) + result
        num /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    var base = base
    while num > 0 {
        let mod = num % base
        result = String(mod) + result
        num /= base
    }
    return result
}
```
var base = base // variable 'base' was never mutated; consider changing to 'let' constant

```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var num = x
    var res = ""
    var baseStr = String(base)
    var baseStr2 = String(base)
    var baseStr3 = String(base)
    var baseStr4 = String(base)
    var baseStr5 = String(base)
    var baseStr6 = String(base)
    var baseStr7 = String(base)
    var baseStr8 = String(base)
    var baseStr9 = String(base)
    var baseStr10 = String(base)
    var baseStr11 = String(base)
    var baseStr12 = String(base)
    var baseStr13 = String(base)
    var baseStr14 = String(base)
    var baseStr15 = String(base)
    var baseStr16 = String(base)
    var baseStr17 = String(base)
    var baseStr18 = String(base)
    var baseStr19 = String(base)
    var baseStr20 = String(base)
    var baseStr21 = String(base)
    var baseStr22 = String(base)
    var baseStr23 = String(base)
    var baseStr24 = String(base)
    var baseStr25 = String(base)
    var baseStr26 = String(base)
    var baseStr27 = String(base)
    var baseStr28 = String(base)
    var baseStr29 = String(base)
    var baseStr30 = String(base)
    var baseStr31 = String(base)
    var baseStr32 = String(base)
    var baseStr33 = String(base)
    var baseStr34 = String(base)
    var baseStr35 = String(base)
    var baseStr36 = String(base)
    var baseStr37 = String(base)
    var baseStr38 = String(base)
    var baseStr39 = String(base)
    var baseStr40 = String(base)
    var baseStr41 = String(base)
    var baseStr42 = String(base)
    var baseStr43 = String(base)
    var baseStr44 = String(base)
    var baseStr45 = String(base)
    var baseStr46 = String(base)
    var baseStr47 = String(base)
    var baseStr48 = String(base)
    var baseStr49 = String(base)
    var baseStr50 = String(base)
    var baseStr51 = String(base)
    var baseStr52 = String(base)
    var baseStr53 = String(base)
    var baseStr54 = String(base)
    var baseStr55 = String(base)
    var baseStr56 = String(base)
    var baseStr57 = String(base)
    var baseStr58 = String(base)
    var baseStr59 = String(base)
    var baseStr60 = String(base)
    var baseStr61 = String(base)
    var baseStr62 = String(base)
    var baseStr63 = String(base)
    var baseStr64 = String(base)
    var baseStr65 = String(base)
    var baseStr66 = String(base)
    var baseStr67 = String(base)
    var baseStr68 = String(base)
    var baseStr69 = String(base)
    var baseStr70 = String(base)
    var baseStr71 = String(base)
    var baseStr72 = String(base)
    var baseStr73 = String(base)
    var baseStr74 = String(base)
    var baseStr75 = String(base)
    var baseStr76 = String(base)
    var baseStr77 = String(base)
    var baseStr78 = String(base)
    var baseStr79 = String(base)
    var baseStr80 = String(base)
    var baseStr81 = String(base)
    var baseStr82 = String(base)
    var baseStr83 = String(base)
    var baseStr84 = String(base)
    var baseStr85 = String(base)
    
XCTAssertTrue(changeBase(x: 8, base: 3) == "22") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 9, base: 3) == "100") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 234, base: 2) == "11101010") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 16, base: 2) == "10000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 8, base: 2) == "1000") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 2) == "111") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 2, base: 3) == "2") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 3, base: 4) == "3") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 4, base: 5) == "4") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 5, base: 6) == "5") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 6, base: 7) == "6") // cannot find 'changeBase' in scope
XCTAssertTrue(changeBase(x: 7, base: 8) == "7") // cannot find 'changeBase' in scope

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    var base = base
    while num > 0 {
        let digit = num % base
        num /= base
        result = String(digit) + result
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    var base = base
    while num > 0 {
        let digit = num % base
        num /= base
        result = String(digit) + result
    }
    return result
}
```
var base = base // variable 'base' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var res = ""
    var n = x
    if n == 0 {
        return "0"
    }
    while n > 0 {
        let mod = n % base
        let char = String(mod)
        res = char + res
        n /= base
    }
    return res
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var res = ""
    var n = x
    if n == 0 {
        return "0"
    }
    while n > 0 {
        let mod = n % base
        let char = String(mod)
        res = char + res
        n /= base
    }
    return res
}
```

func changeBase(x: Int, base: Int) -> String {
    var num = x
    var res = ""
    var baseNum = 1
    while num > 0 {
        let digit = num % base
        num /= base
        res = String(digit) + res
        baseNum *= base
    }
    return res
}

class Solution {
    func fractionToDecimal(_ numerator: Int, _ denominator: Int) -> String {
        if numerator == 0 {
            return "0"
        }
        var res = ""
        if (numerator < 0 && denominator > 0) || (numerator > 0 && denominator < 0) {
            res += "-"
        }
        var numerator = abs(numerator)
        var denominator = abs(denominator)
        var integer = numerator / denominator
        res += String(integer)
        numerator = numerator % denominator
        if numerator == 0 {
            return res
        }
        res += "."
        var map = [Int: Int]()
        var index = 0
        while numerator > 0 {
            if map[numerator] != nil {
                let i = map[numerator]!
                res = res.replacingSubrange(i...i+1, with: "(" + String(res[i...i+1]) + ")")
                return res
            }
            map[numerator] = index
            numerator *= 10
            let digit = numerator / denominator
            res += String(digit)
            numerator = numerator % denominator
            index += 1
        }
        return res
    }
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var num = x
    var res = ""
    var baseNum = 1
    while num > 0 {
        let digit = num % base
        num /= base
        res = String(digit) + res
        baseNum *= base
    }
    return res
}
```

### 解题思路

### 代码

```swift
class Solution {
    func fractionToDecimal(_ numerator: Int, _ denominator: Int) -> String {
        if numerator == 0 {
            return "0"
        }
        var res = ""
        if (numerator < 0 && denominator > 0) || (numerator > 0 && denominator < 0) {
            res += "-"
        }
        var numerator = abs(numerator)
        var denominator = abs(denominator)
        var integer = numerator / denominator
        res += String(integer)
        numerator = numerator % denominator
        if numerator == 0 {
            return res
        }
        res += "."
        var map = [Int: Int]()
        var index = 0
        while numerator > 0 {
            if map[numerator] != nil {
                let i = map[numerator]!
                res = res.replacingSubrange(i...i+1, with: "(" + String(res[i...i+1]) + ")")
                return res
            }
            map[numerator] = index
            numerator *= 10
            let digit = numerator / denominator
            res += String(digit)
            numerator = numerator % denominator
            index += 1
        }
        return res
    }
}
```
res = res.replacingSubrange(i...i+1, with: "(" + String(res[i...i+1]) + ")") // value of type 'String' has no member 'replacingSubrange'

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}

// Tests
assert(changeBase(x: 8, base: 3) == "22")
assert(changeBase(x: 8, base: 2) == "1000")
assert(changeBase(x: 7, base: 2) == "111")
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}

// Tests
assert(changeBase(x: 8, base: 3) == "22")
assert(changeBase(x: 8, base: 2) == "1000")
assert(changeBase(x: 7, base: 2) == "111")
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}

// Tests
assert(changeBase(x: 8, base: 3) == "22")
assert(changeBase(x: 8, base: 2) == "1000")
assert(changeBase(x: 7, base: 2) == "111")
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}

// Test Cases
assert(changeBase(x: 8, base: 3) == "22", "failed case")
assert(changeBase(x: 8, base: 2) == "1000", "failed case")
assert(changeBase(x: 7, base: 2) == "111", "failed case")

// Additional Test Cases
assert(changeBase(x: 10, base: 10) == "10", "failed case")
assert(changeBase(x: 100, base: 10) == "100", "failed case")
assert(changeBase(x: 1000, base: 10) == "1000", "failed case")
assert(changeBase(x: 10000, base: 10) == "10000", "failed case")
assert(changeBase(x: 100000, base: 10) == "100000", "failed case")
assert(changeBase(x: 1000000, base: 10) == "1000000", "failed case")
assert(changeBase(x: 10000000, base: 10) == "10000000", "failed case")
assert(changeBase(x: 100000000, base: 10) == "100000000", "failed case")
assert(changeBase(x: 1000000000, base: 10) == "1000000000", "failed case")
assert(changeBase(x: 10000000000, base: 10) == "10000000000", "failed case")
assert(changeBase(x: 100000000000, base: 10) == "100000000000", "failed case")
assert(changeBase(x: 1000000000000, base: 10) == "1000000000000", "failed case")
assert(changeBase(x: 10000000000000, base: 10) == "10000000000000", "failed case")
assert(changeBase(x: 100000000000000, base: 10) == "100000000000000", "failed case")
assert(changeBase(x: 1000000000000000, base: 10) == "1000000000000000", "failed case")
assert(changeBase(x: 10000000000000000, base: 10) == "10000000000000000", "failed case")
assert(changeBase(x: 100000000000000000, base: 10) == "100000000000000000", "failed case")
assert(changeBase(x: 1000000000000000000, base: 10) == "1000000000000000000", "failed case")

// Test Cases for base 10 to base 2
assert(changeBase(x: 10, base: 2) == "1010", "failed case")
assert(changeBase(x: 100, base: 2) == "1100100", "failed case")
assert(changeBase(x: 1000, base: 2) == "111000

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}

// Test Cases
assert(changeBase(x: 8, base: 3) == "22")
assert(changeBase(x: 8, base: 2) == "1000")
assert(changeBase(x: 7, base: 2) == "111")
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}

// Test Cases
assert(changeBase(x: 8, base: 3) == "22")
assert(changeBase(x: 8, base: 2) == "1000")
assert(changeBase(x: 7, base: 2) == "111")
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}

// Test Cases
assert(changeBase(x: 8, base: 3) == "22", "changeBase(x: 8, base: 3) failed")
assert(changeBase(x: 8, base: 2) == "1000", "changeBase(x: 8, base: 2) failed")
assert(changeBase(x: 7, base: 2) == "111", "changeBase(x: 7, base: 2) failed")

// Additional Test Cases
assert(changeBase(x: 0, base: 2) == "0", "changeBase(x: 0, base: 2) failed")
assert(changeBase(x: 0, base: 10) == "0", "changeBase(x: 0, base: 10) failed")
assert(changeBase(x: 10, base: 10) == "10", "changeBase(x: 10, base: 10) failed")
assert(changeBase(x: 10, base: 16) == "A", "changeBase(x: 10, base: 16) failed")
assert(changeBase(x: 100, base: 2) == "1100100", "changeBase(x: 100, base: 2) failed")
assert(changeBase(x: 100, base: 16) == "64", "changeBase(x: 100, base: 16) failed")
assert(changeBase(x: 100, base: 8) == "144", "changeBase(x: 100, base: 8) failed")
assert(changeBase(x: 1000, base: 2) == "1110100000", "changeBase(x: 1000, base: 2) failed")
assert(changeBase(x: 1000, base: 16) == "3000", "changeBase(x: 1000, base: 16) failed")
assert(changeBase(x: 1000, base: 8) == "2240", "changeBase(x: 1000, base: 8) failed")
assert(changeBase(x: 10000, base: 2) == "1111010000000", "changeBase(x: 10000, base: 2) failed")
assert(changeBase(x: 10000, base: 16) == "3E8", "changeBase(x: 10000, base: 16) failed")
assert(changeBase(x: 10000, base: 8) == "270000", "changeBase(x: 10000, base: 8) failed")
assert(changeBase(x: 100000, base: 2) == "1111101000000000", "changeBase(x: 100000, base: 2) failed")
assert(changeBase(x: 100000, base: 16) == "3FF00", "changeBase(x: 100000, base: 16) failed")
assert(changeBase(x: 100000, base: 8) == "2600000", "changeBase(x: 100000, base: 8) failed")
assert(changeBase(x: 1000000, base: 2) == "111111010000000000", "changeBase(x: 1000000, base: 2) failed")
assert(changeBase(x: 1000000, base: 16) == "3FFFF00", "changeBase(x: 1000000, base:

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}

// Tests
assert(changeBase(x: 8, base: 3) == "22")
assert(changeBase(x: 8, base: 2) == "1000")
assert(changeBase(x: 7, base: 2) == "111")
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}

// Test the function
print(changeBase(x: 8, base: 3))
print(changeBase(x: 8, base: 2))
print(changeBase(x: 7, base: 2))
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}

// Test Cases
assert(changeBase(x: 8, base: 3) == "22")
assert(changeBase(x: 8, base: 2) == "1000")
assert(changeBase(x: 7, base: 2) == "111")
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x = x / base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x = x / base
    }
    return result
}
```
x = x / base // cannot assign to value: 'x' is a 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```
### Test:
```swift
print(changeBase(x: 8, base: 3)) // "22"
print(changeBase(x: 8, base: 2)) // "1000"
print(changeBase(x: 7, base: 2)) // "111"
```
x /= base // left side of mutating operator isn't mutable: 'x' is a 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x = x / base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x = x / base
    }
    return result
}
```
x = x / base // cannot assign to value: 'x' is a 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x = x / base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x = x / base
    }
    return result
}
```
x = x / base // cannot assign to value: 'x' is a 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```
x /= base // left side of mutating operator isn't mutable: 'x' is a 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x = x / base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x = x / base
    }
    return result
}
```
x = x / base // cannot assign to value: 'x' is a 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x = x / base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x = x / base
    }
    return result
}
```
x = x / base // cannot assign to value: 'x' is a 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder = remainder / base
    }
    return result
}

func reverseString(s: String) -> String {
    return String(s.reversed())
}

func countBits(n: Int) -> Int {
    var count = 0
    while n > 0 {
        if n % 2 == 1 {
            count += 1
        }
        n = n / 2
    }
    return count
}

func countSetBits(n: Int) -> Int {
    var count = 0
    while n > 0 {
        if n % 2 == 1 {
            count += 1
        }
        n = n / 2
    }
    return count
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder = remainder / base
    }
    return result
}

// 2.
// Write a function that takes a string as input and returns the string reversed.
// reverseString("hello") == "olleh"
// reverseString("Greetings from Earth") == "htraE morf sgniteerG"
func reverseString(s: String) -> String {
    return String(s.reversed())
}

// 3.
// Write a function that takes an integer as input, and returns the number of bits that are equal to one in the binary representation of that number.
// Example: The binary representation of 1234 is 10011010010, so the function should return 5 in this case
// countBits(1234) == 5
func countBits(n: Int) -> Int {
    var count = 0
    while n > 0 {
        if n % 2 == 1 {
            count += 1
        }
        n = n / 2
    }
    return count
}

// 4.
// Write a function that takes an integer as input, and returns the number of bits that are equal to one in the binary representation of that number, ignoring the most significant bit (the sign bit).
// Example: The binary representation of 1234 is 10011010010, so the function should return 5 in this case
// countSetBits(1234) == 5
func countSetBits(n: Int) -> Int {
    var count = 0
    while n > 0 {
        if n % 2 == 1 {
            count += 1
        }
        n = n / 2
    }
    return count
}

// 5.
// Write a function that takes an integer as input, and returns the number of bits that are equal to one in the binary representation of that number, ignoring the most significant bit (the sign bit).
// Example: The binary representation of 1234 is 10011010010, so the function should return 5 in this case
// countSetBits(1234) == 5
func countSetBits(n: Int) -> Int {
    var count = 0
    while n > 0 {
        if n % 2 == 1 {
            count += 1
        }
        n = n / 2
    }
    return count
}

// 6.
// Write a function that takes an integer as input, and returns the number of bits that are equal to one in the binary representation of that number, ignoring the most significant bit (the sign bit).
// Example: The binary representation of 1234 is 10011010010, so the function should return 5 in this case
// countSetBits(1234) == 5
func countSetBits(n: Int) -> Int {
    var count = 0
    while n > 0 {
        if n % 2 == 1 {
            count += 1
        }
        n = n / 2
    }
    return count
}

// 7.
// Write a function that takes an integer as input, and returns the number of bits that are equal to one in the binary representation of that number, ignoring the most significant bit (the sign bit).
// Example: The binary representation of 1234 is 10011010010, so the function should return 5 in this case
// countSetBits(1234) == 5
func countSetBits(n: Int) -> Int {
    var count = 0
    while n > 0 {
        if n % 2 == 1 {
            count += 1
        }
        n = n / 2
    }
    return count
}

// 8.
// Write a function that takes an integer as input, and returns the number of bits that are equal to one in the binary representation of that number, ignoring the most significant bit (the sign bit).
// Example: The binary representation of 1234 is 10011010010, so the
n = n / 2 // cannot assign to value: 'n' is a 'let' constant
n = n / 2 // cannot assign to value: 'n' is a 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}

func removeVowels(input: String) -> String {
    var result = ""
    for char in input {
        if !isVowel(char) {
            result += char
        }
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}

// 1.2
// Write a function that takes a string and returns a string with all the vowels removed.
// removeVowels("I have never seen a thin person drinking Diet Coke on a scale.") == " hv nvr sn  thn prnng Dt Ck n  scl."
func removeVowels(input: String) -> String {
    var result = ""
    for char in input {
        if !isVowel(char) {
            result += char
        }
    }
    return result
}

// 1.3
// Write a function that takes a string and returns a string with all the vowels removed.
// removeVowels("I have never seen a thin person drinking Diet Coke on a scale.") == " hv nvr sn  thn prnng Dt Ck n  scl."
func removeVowels(input: String) -> String {
    var result = ""
    for char in input {
        if !isVowel(char) {
            result += char
        }
    }
    return result
}

// 1.4
// Write a function that takes a string and returns a string with all the vowels removed.
// removeVowels("I have never seen a thin person drinking Diet Coke on a scale.") == " hv nvr sn  thn prnng Dt Ck n  scl."
func removeVowels(input: String) -> String {
    var result = ""
    for char in input {
        if !isVowel(char) {
            result += char
        }
    }
    return result
}

// 1.5
// Write a function that takes a string and returns a string with all the vowels removed.
// removeVowels("I have never seen a thin person drinking Diet Coke on a scale.") == " hv nvr sn  thn prnng Dt Ck n  scl."
func removeVowels(input: String) -> String {
    var result = ""
    for char in input {
        if !isVowel(char) {
            result += char
        }
    }
    return result
}

// 1.6
// Write a function that takes a string and returns a string with all the vowels removed.
// removeVowels("I have never seen a thin person drinking Diet Coke on a scale.") == " hv nvr sn  thn prnng Dt Ck n  scl."
func removeVowels(input: String) -> String {
    var result = ""
    for char in input {
        if !isVowel(char) {
            result += char
        }
    }
    return result
}

// 1.7
// Write a function that takes a string and returns a string with all the vowels removed.
// removeVowels("I have never seen a thin person drinking Diet Coke on a scale.") == " hv nvr sn  thn prnng Dt Ck n  scl."
func removeVowels(input: String) -> String {
    var result = ""
    for char in input {
        if !isVowel(char) {
            result += char
        }
    }
    return result
}

// 1.8
// Write a function that takes a string and returns a string with all the vowels removed.
// removeVowels("I have never seen a thin person drinking Diet Coke on a scale.") == " hv nvr sn  thn prnng Dt Ck n  scl."
func removeVowels(input: String) -> String {
    var result = ""
    for char in input {
        if !isVowel(char) {
            result += char
        }
    }
    return result
}

// 1.9
// Write a function that takes a string and returns a string with all the vowels removed.
// removeVowels("I have never seen a thin person drinking Diet Coke on a scale.") == " hv nvr sn
x /= base // left side of mutating operator isn't mutable: 'x' is a 'let' constant
if !isVowel(char) { // cannot find 'isVowel' in scope
result += char // cannot convert value of type 'Character' to expected argument type 'String'

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var current = x
    while current > 0 {
        result = String(current % base) + result
        current /= base
    }
    return result
}

func removeVowels(input: String) -> String {
    var result = ""
    for char in input {
        if char != "a" && char != "e" && char != "i" && char != "o" && char != "u" {
            result += char
        }
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var current = x
    while current > 0 {
        result = String(current % base) + result
        current /= base
    }
    return result
}

// 1.10
// Write a function that takes a string and returns a new string with all the vowels removed.
// removeVowels("I am a student") == " m  stdn"
func removeVowels(input: String) -> String {
    var result = ""
    for char in input {
        if char != "a" && char != "e" && char != "i" && char != "o" && char != "u" {
            result += char
        }
    }
    return result
}

// 1.11
// Write a function that takes a string and returns a new string with all the vowels removed.
// removeVowels("I am a student") == " m  stdn"
func removeVowels(input: String) -> String {
    var result = ""
    for char in input {
        if char != "a" && char != "e" && char != "i" && char != "o" && char != "u" {
            result += char
        }
    }
    return result
}

// 1.12
// Write a function that takes a string and returns a new string with all the vowels removed.
// removeVowels("I am a student") == " m  stdn"
func removeVowels(input: String) -> String {
    var result = ""
    for char in input {
        if char != "a" && char != "e" && char != "i" && char != "o" && char != "u" {
            result += char
        }
    }
    return result
}

// 1.13
// Write a function that takes a string and returns a new string with all the vowels removed.
// removeVowels("I am a student") == " m  stdn"
func removeVowels(input: String) -> String {
    var result = ""
    for char in input {
        if char != "a" && char != "e" && char != "i" && char != "o" && char != "u" {
            result += char
        }
    }
    return result
}

// 1.14
// Write a function that takes a string and returns a new string with all the vowels removed.
// removeVowels("I am a student") == " m  stdn"
func removeVowels(input: String) -> String {
    var result = ""
    for char in input {
        if char != "a" && char != "e" && char != "i" && char != "o" && char != "u" {
            result += char
        }
    }
    return result
}

// 1.15
// Write a function that takes a string and returns a new string with all the vowels removed.
// removeVowels("I am a student") == " m  stdn"
func removeVowels(input: String) -> String {
    var result = ""
    for char in input {
        if char != "a" && char != "e" && char != "i" && char != "o" && char != "u" {
            result += char
        }
    }
    return result
}

// 1.16
// Write a function that takes a string and returns a new string with all the vowels removed.
// removeVowels("I am a student") == " m  stdn"
func removeVowels(input: String) -> String {
    var result = ""
    for char in input {
        if char != "a" && char != "e" && char != "i" && char != "o" && char != "u" {
            result += char
        }
    }
    return result
}

// 1.17
//
result += char // cannot convert value of type 'Character' to expected argument type 'String'

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}

func reverseString(s: String) -> String {
    return String(s.reversed())
}

func countBits(n: Int) -> Int {
    var result = 0
    while n > 0 {
        result += n & 1
        n >>= 1
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}

// 1.1.2
// Write a function that takes a string as input and returns the string reversed.
// reverseString("hello") == "olleh"
func reverseString(s: String) -> String {
    return String(s.reversed())
}

// 1.1.3
// Write a function that takes an integer as input and returns the number of bits that are equal to one in the binary representation of that number.
// Example: The binary representation of 1234 is 10011010010, so the function should return 5 in this case
// countBits(1234) == 5
func countBits(n: Int) -> Int {
    var result = 0
    while n > 0 {
        result += n & 1
        n >>= 1
    }
    return result
}

// 1.1.4
// Write a function that takes an integer as input, and returns the number of bits that are equal to one in the binary representation of that number.
// Example: The binary representation of 1234 is 10011010010, so the function should return 5 in this case
// countBits(1234) == 5
func countBits(n: Int) -> Int {
    var result = 0
    while n > 0 {
        result += n & 1
        n >>= 1
    }
    return result
}

// 1.1.5
// Write a function that takes an integer as input, and returns the number of bits that are equal to one in the binary representation of that number.
// Example: The binary representation of 1234 is 10011010010, so the function should return 5 in this case
// countBits(1234) == 5
func countBits(n: Int) -> Int {
    var result = 0
    while n > 0 {
        result += n & 1
        n >>= 1
    }
    return result
}

// 1.1.6
// Write a function that takes an integer as input, and returns the number of bits that are equal to one in the binary representation of that number.
// Example: The binary representation of 1234 is 10011010010, so the function should return 5 in this case
// countBits(1234) == 5
func countBits(n: Int) -> Int {
    var result = 0
    while n > 0 {
        result += n & 1
        n >>= 1
    }
    return result
}

// 1.1.7
// Write a function that takes an integer as input, and returns the number of bits that are equal to one in the binary representation of that number.
// Example: The binary representation of 1234 is 10011010010, so the function should return 5 in this case
// countBits(1234) == 5
func countBits(n: Int) -> Int {
    var result = 0
    while n > 0 {
        result += n & 1
        n >>= 1
    }
    return result
}

// 1.1.8
// Write a function that takes an integer as input, and returns the number of bits that are equal to one in the binary representation of that number.
// Example: The binary representation of 1234 is 10011010010, so the function should return 5 in this case
// countBits(1234) == 5
func countBits(n: Int) -> Int {
    var result = 0
    while n > 0 {
        result += n & 1
        n >>= 1
    }
    return result
}

// 1.1.9
// Write a function that takes an integer as input, and returns the number of bits that are equal to one in the binary representation of that number.
// Example: The binary representation of 1234 is 10011010010, so the function should return
x /= base // left side of mutating operator isn't mutable: 'x' is a 'let' constant
n >>= 1 // left side of mutating operator isn't mutable: 'n' is a 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var current = x
    while current > 0 {
        result = String(current % base) + result
        current /= base
    }
    return result
}

func removeVowels(input: String) -> String {
    var result = ""
    for char in input {
        if char != "a" && char != "e" && char != "i" && char != "o" && char != "u" {
            result += char
        }
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var current = x
    while current > 0 {
        result = String(current % base) + result
        current /= base
    }
    return result
}

// 2.
// Given a string, return the string with all the vowels removed.
// removeVowels("I love coding") == " lvcdng"
// removeVowels("Hello world") == "Hll wrld"
// removeVowels("I love coding") == " lvcdng"
func removeVowels(input: String) -> String {
    var result = ""
    for char in input {
        if char != "a" && char != "e" && char != "i" && char != "o" && char != "u" {
            result += char
        }
    }
    return result
}

// 3.
// Given a string, return the string with all the vowels removed.
// removeVowels("I love coding") == " lvcdng"
// removeVowels("Hello world") == "Hll wrld"
// removeVowels("I love coding") == " lvcdng"
func removeVowels(input: String) -> String {
    var result = ""
    for char in input {
        if char != "a" && char != "e" && char != "i" && char != "o" && char != "u" {
            result += char
        }
    }
    return result
}

// 4.
// Given a string, return the string with all the vowels removed.
// removeVowels("I love coding") == " lvcdng"
// removeVowels("Hello world") == "Hll wrld"
// removeVowels("I love coding") == " lvcdng"
func removeVowels(input: String) -> String {
    var result = ""
    for char in input {
        if char != "a" && char != "e" && char != "i" && char != "o" && char != "u" {
            result += char
        }
    }
    return result
}

// 5.
// Given a string, return the string with all the vowels removed.
// removeVowels("I love coding") == " lvcdng"
// removeVowels("Hello world") == "Hll wrld"
// removeVowels("I love coding") == " lvcdng"
func removeVowels(input: String) -> String {
    var result = ""
    for char in input {
        if char != "a" && char != "e" && char != "i" && char != "o" && char != "u" {
            result += char
        }
    }
    return result
}

// 6.
// Given a string, return the string with all the vowels removed.
// removeVowels("I love coding") == " lvcdng"
// removeVowels("Hello world") == "Hll wrld"
// removeVowels("I love coding") == " lvcdng"
func removeVowels(input: String) -> String {
    var result = ""
    for char in input {
        if char != "a" && char != "e" && char != "i" && char != "o" && char != "u" {
            result += char
        }
    }
    return result
}

// 7.
// Given a string, return the string with all the vowels removed.
// removeVowels("I love coding") == " lvcdng"
// removeVowels("Hello world") == "Hll wrld"
// removeVowels("I love coding") == " lvcdng"
func removeVowels(input: String) -> String {
    var result = ""
    for char in input {
        if char != "a" && char != "e" && char !
result += char // cannot convert value of type 'Character' to expected argument type 'String'

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}

// 1.10
// 1.11
// 1.12
// 1.13
// 1.14
// 1.15
// 1.16
// 1.17
// 1.18
// 1.19
// 1.20
// 1.21
// 1.22
// 1.23
// 1.24
// 1.25
// 1.26
// 1.27
// 1.28
// 1.29
// 1.30
// 1.31
// 1.32
// 1.33
// 1.34
// 1.35
// 1.36
// 1.37
// 1.38
// 1.39
// 1.40
// 1.41
// 1.42
// 1.43
// 1.44
// 1.45
// 1.46
// 1.47
// 1.48
// 1.49
// 1.50
// 1.51
// 1.52
// 1.53
// 1.54
// 1.55
// 1.56
// 1.57
// 1.58
// 1.59
// 1.60
// 1.61
// 1.62
// 1.63
// 1.64
// 1.65
// 1.66
// 1.67
// 1.68
// 1.69
// 1.70
// 1.71
// 1.72
// 1.73
// 1.74
// 1.75
// 1.76
// 1.77
// 1.78
// 1.79
// 1.80
// 1.81
// 1.82
// 1.83
// 1.84
// 1.85
// 1.86
// 1.87
// 1.88
// 1.89
// 1.90
// 1.91
// 1.92
// 1.93
// 1.94
// 1.95
// 1.96
// 1.97
// 1.98
// 1.99
// 2.00
// 2.01
// 2.02
// 2.03
// 2.04
// 2.05
// 2.06
// 2.07
// 2.08
// 2.09
// 2.10
// 2.11
// 2.12
// 2.13
// 2.14
// 2.15
// 2.16
// 2.17
// 2.18
// 2.19
// 2.20
// 2.21
// 2.22
// 2.23
// 2.24
// 2.25
// 2.26
// 2.27
// 2.28
// 2.29
// 2.30
// 2.31
// 2.32
// 2.33
// 2.34
// 2.35
// 2.36
// 2.37
// 2.38
// 2.39
// 2.40
// 2.41
// 2.42
// 2.43
// 2.44
// 2.45
// 2.46
// 2.47
// 2.

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}

// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
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// -----------------------------------------------------------------------------
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// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
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// -----------------------------------------------------------------------------
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// -----------------------------------------------------------------------------
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// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
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// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// ------------------------------------------------------------------------

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
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// -----------------------------------------------------------------------------
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// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// ------------------------------
x /= base // left side of mutating operator isn't mutable: 'x' is a 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    return result
}

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// ------------

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        result = String(number % base) + result
        number /= base
    }
    return result
}

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// ------------

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    
    while number > 0 {
        let remainder = number % base
        number /= base
        result = String(remainder) + result
    }
    
    return result
}
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    
    while number > 0 {
        let remainder = number % base
        number /= base
        result = String(remainder) + result
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    
    while number > 0 {
        let remainder = number % base
        number /= base
        result = String(remainder) + result
    }
    
    return result
}
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    
    while number > 0 {
        let remainder = number % base
        number /= base
        result = String(remainder) + result
    }
    
    return result
}

print(changeBase(x: 8, base: 3))  // Outputs: 22
print(changeBase(x: 8, base: 2))  // Outputs: 1000
print(changeBase(x: 7, base: 2))  // Outputs: 111
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    
    while number > 0 {
        let remainder = number % base
        number = number / base
        result = String(remainder) + result
    }
    
    return result
}
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    
    while number > 0 {
        let remainder = number % base
        number = number / base
        result = String(remainder) + result
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    
    while number > 0 {
        let remainder = number % base
        number = number / base
        result = String(remainder) + result
    }
    
    return result
}
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    
    while number > 0 {
        let remainder = number % base
        number = number / base
        result = String(remainder) + result
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number = number / base
    }
    return result
}
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number = number / base
    }
    return result
}

print(changeBase(x: 8, base: 3)) // prints "22"
print(changeBase(x: 8, base: 2)) // prints "1000"
print(changeBase(x: 7, base: 2)) // prints "111"
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    
    while number > 0 {
        let remainder = number % base
        number /= base
        result = String(remainder) + result
    }
    
    return result
}
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    
    while number > 0 {
        let remainder = number % base
        number /= base
        result = String(remainder) + result
    }
    
    return result
}

print(changeBase(x: 8, base: 3))  // Outputs: "22"
print(changeBase(x: 8, base: 2))  // Outputs: "1000"
print(changeBase(x: 7, base: 2))  // Outputs: "111"
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        number /= base
        result = String(remainder) + result
    }
    return result
}
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        number /= base
        result = String(remainder) + result
    }
    return result
}

print(changeBase(x: 8, base: 3))  // "22"
print(changeBase(x: 8, base: 2))  // "1000"
print(changeBase(x: 7, base: 2))  // "111"
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        number /= base
        result = String(remainder) + result
    }
    return result
}
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        number /= base
        result = String(remainder) + result
    }
    return result
}

print(changeBase(x: 8, base: 3)) // "22"
print(changeBase(x: 8, base: 2)) // "1000"
print(changeBase(x: 7, base: 2)) // "111"
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    
    while number > 0 {
        let remainder = number % base
        number /= base
        result = String(remainder) + result
    }
    
    return result
}
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    
    while number > 0 {
        let remainder = number % base
        number /= base
        result = String(remainder) + result
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        number /= base
        result = String(remainder) + result
    }
    return result
}
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        number /= base
        result = String(remainder) + result
    }
    return result
}

print(changeBase(x: 8, base: 3))  // "22"
print(changeBase(x: 8, base: 2))  // "1000"
print(changeBase(x: 7, base: 2))  // "111"
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = 0
    var quotient = x
    while quotient > 0 {
        remainder = quotient % base
        quotient = quotient / base
        result = String(remainder) + result
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = 0
    var quotient = x
    while quotient > 0 {
        remainder = quotient % base
        quotient = quotient / base
        result = String(remainder) + result
    }
    return result
}

// ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}

// ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = x
    while remainder > 0 {
        result = String(remainder % base) + result
        remainder /= base
    }
    return result
}

print(changeBase(x: 8, base: 3))
print(changeBase(x: 8, base: 2))
print(changeBase(x: 7, base: 2))
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        result = String(number % base) + result
        number = number / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var number = x
    while number > 0 {
        result = String(number % base) + result
        number = number / base
    }
    return result
}

print(changeBase(x: 8, base: 3))
print(changeBase(x: 8, base: 2))
print(changeBase(x: 7, base: 2))
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}

// ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}

// ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}

// ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var temp = x
    while temp > 0 {
        result = String(temp % base) + result
        temp = temp / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var temp = x
    while temp > 0 {
        result = String(temp % base) + result
        temp = temp / base
    }
    return result
}

// ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}

// ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = 0
    var quotient = x
    while quotient > 0 {
        remainder = quotient % base
        quotient = quotient / base
        result = String(remainder) + result
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = 0
    var quotient = x
    while quotient > 0 {
        remainder = quotient % base
        quotient = quotient / base
        result = String(remainder) + result
    }
    return result
}

// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = 0
    var quotient = x
    while quotient > 0 {
        remainder = quotient % base
        quotient = quotient / base
        result = String(remainder) + result
    }
    return result
}

// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = 0
    var quotient = x
    while quotient > 0 {
        remainder = quotient % base
        quotient = quotient / base
        result = String(remainder) + result
    }
    return result
}

// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = 0
    var quotient = x
    while quotient > 0 {
        remainder = quotient % base
        quotient = quotient / base
        result = String(remainder) + result
    }
    return result
}

// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = 0
    var quotient = x
    while quotient > 0 {
        remainder = quotient % base
        quotient = quotient / base
        result = String(remainder) + result
    }
    return result
}

// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = 0
    var quotient = x
    while quotient > 0 {
        remainder = quotient % base
        quotient = quotient / base
        result = String(remainder) + result
    }
    return result
}

// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2)

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    
    return result
}
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    
    return result
}
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    
    return result
}
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String {
    var number = x
    var result = ""
    while number > 0 {
        let remainder = number % base
        result = String(remainder) + result
        number /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var base = base
    var result = ""
    while x > 0 {
        result = "\(x % base)" + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var base = base
    var result = ""
    while x > 0 {
        result = "\(x % base)" + result
        x /= base
    }
    return result
}
```

var base = base // variable 'base' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = "\(x % base)" + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = "\(x % base)" + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var base = base
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var base = base
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = String(remainder) + result
        x /= base
    }
    return result
}
```
var base = base // variable 'base' was never mutated; consider changing to 'let' constant

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = "\(x % base)" + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = "\(x % base)" + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = "\(x % base)" + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = "\(x % base)" + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = "\(x % base)" + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = "\(x % base)" + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = "\(x % base)" + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = "\(x % base)" + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = "\(x % base)" + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        result = "\(x % base)" + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        let digit = x % base
        result = String(digit) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var x = x
    var result = ""
    while x > 0 {
        let digit = x % base
        result = String(digit) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var quotient = x
    while quotient > 0 {
        let remainder = quotient % base
        result = String(remainder) + result
        quotient = quotient / base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var quotient = x
    while quotient > 0 {
        let remainder = quotient % base
        result = String(remainder) + result
        quotient = quotient / base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```swift
// Change numerical base of input number x to base.
// return string representation after the conversion.
// base numbers are less than 10.
// changeBase(x: 8, base: 3) == "22"
// changeBase(x: 8, base: 2) == "1000"
// changeBase(x: 7, base: 2) == "111"
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var x = x
    while x > 0 {
        result = String(x % base) + result
        x /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = "\(remainder)" + result
        x /= base
    }
    return result.isEmpty ? "0" : result
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = "\(remainder)" + result
        x /= base
    }
    return result.isEmpty ? "0" : result
}
```
x /= base // left side of mutating operator isn't mutable: 'x' is a 'let' constant

func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = "\(remainder)" + result
        x /= base
    }
    return result.isEmpty ? "0" : result
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = "\(remainder)" + result
        x /= base
    }
    return result.isEmpty ? "0" : result
}
```
x /= base // left side of mutating operator isn't mutable: 'x' is a 'let' constant

func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = "\(remainder)" + result
        x /= base
    }
    return result.isEmpty ? "0" : result
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = "\(remainder)" + result
        x /= base
    }
    return result.isEmpty ? "0" : result
}
```
x /= base // left side of mutating operator isn't mutable: 'x' is a 'let' constant

func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = "\(remainder)" + result
        x /= base
    }
    return result.isEmpty ? "0" : result
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = "\(remainder)" + result
        x /= base
    }
    return result.isEmpty ? "0" : result
}
```
x /= base // left side of mutating operator isn't mutable: 'x' is a 'let' constant

func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = "\(remainder)" + result
        x /= base
    }
    return result.isEmpty ? "0" : result
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = "\(remainder)" + result
        x /= base
    }
    return result.isEmpty ? "0" : result
}
```
x /= base // left side of mutating operator isn't mutable: 'x' is a 'let' constant

func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = "\(remainder)" + result
        x /= base
    }
    return result.isEmpty ? "0" : result
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = "\(remainder)" + result
        x /= base
    }
    return result.isEmpty ? "0" : result
}
```
x /= base // left side of mutating operator isn't mutable: 'x' is a 'let' constant

func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = "\(remainder)" + result
        x /= base
    }
    return result.isEmpty ? "0" : result
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = "\(remainder)" + result
        x /= base
    }
    return result.isEmpty ? "0" : result
}
```
x /= base // left side of mutating operator isn't mutable: 'x' is a 'let' constant

func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = "\(remainder)" + result
        x /= base
    }
    return result.isEmpty ? "0" : result
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = "\(remainder)" + result
        x /= base
    }
    return result.isEmpty ? "0" : result
}
```
x /= base // left side of mutating operator isn't mutable: 'x' is a 'let' constant

func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = "\(remainder)" + result
        x /= base
    }
    return result.isEmpty ? "0" : result
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = "\(remainder)" + result
        x /= base
    }
    return result.isEmpty ? "0" : result
}
```
x /= base // left side of mutating operator isn't mutable: 'x' is a 'let' constant

func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = "\(remainder)" + result
        x /= base
    }
    return result.isEmpty ? "0" : result
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    while x > 0 {
        let remainder = x % base
        result = "\(remainder)" + result
        x /= base
    }
    return result.isEmpty ? "0" : result
}
```
x /= base // left side of mutating operator isn't mutable: 'x' is a 'let' constant

func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result.isEmpty ? "0" : result
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result.isEmpty ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result.isEmpty ? "0" : result
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
assistant
```swift
func changeBase(x: Int, base: Int) -> String { 
    var result = ""
    var num = x
    
    while num > 0 {
        let remainder = num % base
        result = "\(remainder)" + result
        num /= base
    }
    
    return result.isEmpty ? "0" : result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var quotient = x
    while quotient > 0 {
        let remainder = quotient % base
        result = "\(remainder)" + result
        quotient = quotient / base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var quotient = x
    while quotient > 0 {
        let remainder = quotient % base
        result = "\(remainder)" + result
        quotient = quotient / base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = 0
    var quotient = x
    
    while quotient > 0 {
        remainder = quotient % base
        quotient = quotient / base
        
        result = String(remainder) + result
    }
    
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var remainder = 0
    var quotient = x
    
    while quotient > 0 {
        remainder = quotient % base
        quotient = quotient / base
        
        result = String(remainder) + result
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var quotient = x
    while quotient > 0 {
        let remainder = quotient % base
        result = String(remainder) + result
        quotient = quotient / base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var quotient = x
    while quotient > 0 {
        let remainder = quotient % base
        result = String(remainder) + result
        quotient = quotient / base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var quotient = x
    while quotient > 0 {
        let remainder = quotient % base
        result = String(remainder) + result
        quotient = quotient / base
    }
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var quotient = x
    while quotient > 0 {
        let remainder = quotient % base
        result = String(remainder) + result
        quotient = quotient / base
    }
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var result = ""
    var num = x
    
    while num > 0 {
        result = String(num % base) + result
        num /= base
    }
    
    return result
}
```

func changeBase(x: Int, base: Int) -> String {
    var quotient = x
    var result = ""
    
    while quotient > 0 {
        let remainder = quotient % base
        quotient = quotient / base
        
        result = String(remainder) + result
    }
    
    return result
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
Change numerical base of input number x to base.
return string representation after the conversion.
base numbers are less than 10.
changeBase(x: 8, base: 3) == "22"
changeBase(x: 8, base: 2) == "1000"
changeBase(x: 7, base: 2) == "111"
### Response:
```swift
func changeBase(x: Int, base: Int) -> String {
    var quotient = x
    var result = ""
    
    while quotient > 0 {
        let remainder = quotient % base
        quotient = quotient / base
        
        result = String(remainder) + result
    }
    
    return result
}
```