Case Changer

func alternateCase(input: String): String {    var output: String = ""
    for (var i = 0; i < input.length; i += 1) {        if (input.get(i).lower() != input.get(i)) output += input.get(i).lower()        else output += input.get(i).upper()    }
    return output}
print(alternateCase("Hello World!")) # hELLO wORLD!print(alternateCase("TeeEEEsssTTTtT!")) # tEEeeeSSStttTt!

This code loops over the input string and changes the case of each character to the opposite of what it is.

import random
func randomCase(input: String): String {    var output: String = ""        for (var i = 0; i < input.length; i += 1) {        if (random.randint(1, 2) == 1) output += input.get(i).upper()        else output += input.get(i).lower()    }
    return output}
print(randomCase("The quick brown fox jumps over the lazy dog!"))

This code loops over the input string, and randomly uppercases or lowercases the characters.