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iOS Swift Functions and Optionals Optionals Review: Functions

Can someone Help me ? (Swift)

Hi there,

I am stuck on this challenge and i don't know what i am doing wrongThis is my challenge: Given the isDivisible function, create another function called isNotDivisible which also takes in two parameters, namely the dividend and the divisor. It should also return a Bool. The goal of this new function is to let you know whether a dividend is NOT divisible by the divisor. (Note: the function should return only a Bool and not an optional.) This is my error: Bummer! You need to define a func named isNotDivisible that takes a Int parameter named dividend and another Int parameter named divisor and returns a Bool. -Note- There are also a few errors in my code itself.

Thank you for your help!

divisible.swift
func isDivisible(#dividend: Int, #divisor: Int) -> Bool {
    if dividend % divisor == 0 {
        return true
    } else {
        return false
    }
}

func isNotDividible(#dividend: Int, #divisor: Int) -> Bool {
  let sol = (divident % divisor) {
  if let sol == 0
  return true
  } 
  return false
}

2 Answers

William Li
PLUS
William Li
Courses Plus Student 26,867 Points

Hi, Mathis Van Eetvelde .

This challenge is actually super easy. Your implementation of isNotDividible function should be nearly identical to isDivisible provided by the challenge. Because these 2 functions are doing the exact opposite things.

func isNotDivisible(#dividend: Int, #divisor: Int) -> Bool {
    if dividend % divisor == 0 {
        return false
    } else {
        return true
    }
}

You see, In the isNotDivisible function, all I did was swap the truthiness of the return value from the isDivisible function, and that's all there's to it.

Hi William,

It worked and now i get how to do it. I was actually surprised how easy this is.

Thank you very much!

Sam Donald
Sam Donald
36,305 Points

An even easer way that requires only on character change for the entire function is to just change,

if dividend % divisor == 0 from the isDivisible function to

If dividend % divisor != 0 for the isNotDivisible function.