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iOS Swift Functions and Optionals Optionals Review: Functions

Edwin Mhoy Silva Rifa
Edwin Mhoy Silva Rifa
2,631 Points
Posted by Edwin Mhoy Silva Rifa
Edwin Mhoy Silva Rifa
2,631 Points

Cant seem to make a function which return a bool

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.)

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

2 Answers

Stone Preston
Stone Preston
42,016 Points
Stone Preston
Stone Preston
42,016 Points

bools are either true or false.

the isNotDivisable function is the opposite of the isDivisable function. We want to return true if the numbers are not divisable and false otherwise

the modulus % operator returns the remainder of a division. if the modulo of two numbers is 0, that means there was no remainder so the first number is evenly divided by the second, if its anything other than zero they are not evenly divisable

If the modulo (%) of the two arguments is zero, then it is divisible and you want to return false. else you return true since they do not divide evenly:

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