Question

How to get the reciprocal of the letters in a string with Swift

Answer 1

import Foundation

func getReciprocal(_ s: String) -> String {
    var tmp = ""
    
    for char in s {
        if char.isUppercase {
            let offset = Character("Z").asciiValue! - char.asciiValue! + Character("A").asciiValue!
            tmp.append(Character(UnicodeScalar(offset)))
        } else if char.isLowercase {
            let offset = Character("z").asciiValue! - char.asciiValue! + Character("a").asciiValue!
            tmp.append(Character(UnicodeScalar(offset)))
        } else {
            tmp.append(char)
        }
    }
    
    return tmp
}

var s = "abc++def"


var reciprocal = getReciprocal(s)

print(reciprocal)




/*
run:

zyx++wvu

*/

 

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