5.16: Swift Examples
- Page ID
- 10669
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Temperature
// This program displays a temperature conversion table showing Fahrenheit // temperatures from 0 to 100, in increments of 10, and the corresponding // Celsius temperatures using While, For, and Do loops. // // References: // https://www.mathsisfun.com/temperature-conversion.html // https://developer.apple.com/library/content/documentation/Swift/Conceptual/Swift_Programming_Language/TheBasics.html func whileLoop() { var fahrenheit: Double var celsius: Double displayHeading() fahrenheit = Double(0) while fahrenheit <= 100 { celsius = calculateCelsius(fahrenheit:fahrenheit) displayResult(fahrenheit:fahrenheit, celsius:celsius) fahrenheit += 10 } print() } func doLoop() { var fahrenheit: Double var celsius: Double displayHeading() fahrenheit = Double(0) repeat { celsius = calculateCelsius(fahrenheit:fahrenheit) displayResult(fahrenheit:fahrenheit, celsius:celsius) fahrenheit += 10 } while fahrenheit <= 100 print() } func forLoop() { var celsius: Double displayHeading() for fahrenheit in stride(from: 0.0, through: 100.0, by: 10.0) { celsius = calculateCelsius(fahrenheit:fahrenheit) displayResult(fahrenheit:fahrenheit, celsius:celsius) } print() } func displayHeading() { print("F°\tC°") } func calculateCelsius(fahrenheit: Double) -> Double { var celsius: Double celsius = (fahrenheit - 32) * 5 / 9 return celsius } func displayResult(fahrenheit: Double, celsius: Double) { print(String(fahrenheit) + "\t" + String(celsius)) } func main() { whileLoop() doLoop() forLoop() } main()
Output
F° C° 0 -17.77777777777778 10 -12.222222222222221 20 -6.666666666666667 30 -1.1111111111111112 40 4.444444444444445 50 10.0 60 15.555555555555555 70 21.11111111111111 80 26.666666666666668 90 32.22222222222222 100 37.77777777777778 F° C° 0 -17.77777777777778 10 -12.222222222222221 20 -6.666666666666667 30 -1.1111111111111112 40 4.444444444444445 50 10.0 60 15.555555555555555 70 21.11111111111111 80 26.666666666666668 90 32.22222222222222 100 37.77777777777778 F° C° 0 -17.77777777777778 10 -12.222222222222221 20 -6.666666666666667 30 -1.1111111111111112 40 4.444444444444445 50 10.0 60 15.555555555555555 70 21.11111111111111 80 26.666666666666668 90 32.22222222222222 100 37.77777777777778
References
- Wikiversity: Computer Programming