Your First iOS & SwiftUI App: An App from Scratch

Feb 13 2023 · Swift 5.7, iOS 16, Xcode 14

Part 3: Coding in Swift

26. Challenge: Calculate the Difference

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Previous episode: 25. If / Else Statements Next episode: 27. Variables & Constants

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In the previous challenge, I mentioned that there’s another way to calculate the difference that requires fewer lines of code - and that’s the subject of this challenge.

func points(sliderValue: Int) -> Int {
  var difference: Int = target - sliderValue
  if difference < 0 {
    difference = difference * -1
    // or difference *= -1
    // or difference = -difference
  }
    difference = difference * -1
    // or difference *= -1
    difference = difference * -1
    // or difference *= -1
    // or difference = -difference