Function that takes a string as input and returns the string reversed.

reversedString.swift

func reverseString(_ s: String) -> String {
        var reversed = ""
        var stringArray = Array(s.characters) 
        var n = s.characters.count
        for i in 0..<stringArray.count{
            reversed.append(stringArray[n-1-i])
        }
        return reversed
 }