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iOS Swift 2.0 Basics Swift Operators Working With Operators

irfan mohammed
irfan mohammed
945 Points

For the first task, we're going to keep it pretty simple and check if we know how to use the remainder and equality oper

For the first task, we're going to keep it pretty simple and check if we know how to use the remainder and equality operators.

In the editor below, you have two constants - value and divisor. Step 1: Using the remainder operator, compute the remainder given the value and a divisor. Assign this value to a constant named result.

Step 2: When value obtained using a remainder operator is 0, this means that the value is a perfect multiple of the divisor. Compare the value of result to 0 using the equality operator and assign the resulting value to a constant named isPerfectMultiple.

Submit your answer after you've completed both steps 1 and 2.

operators.swift
// Enter your code below
let value = 200
let divisor = 5


let someOperation = 20 + 400 % 10 / 2 - 15
let anotherOperation = 52 * 27 % 200 / 2 + 5

// Task 1 - Enter your code below
let result = value  % divisor
result == 0

// Task 2 - Enter your code below
 let isPerfectMultiple = result

  //isPerfectMultiple == result

1 Answer

Close! So what the question is actually wanting you to do in step 2 is to assign the comparison directly to the isPerfectMultiple constant.

The comparison:

result == 0

Is only making the check but not assigning it's result back to the constant result for 2 reasons. First, the constant result cannot be modified, therefore a change to the value it holds is not possible. Second, comparisons are only comparisons that check the value on the left against the value on the right of the operator in between them and return either true or false. It does not return and assign that value.

With that said you are wanting to do something like:

let myResult = someValue % someDivisor

let isAMultiple = myResult == 0