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iOS Swift Basics Swift Operators Working With Operators

Posted by Bill Tihen
Bill Tihen
17,790 Points

I'm getting a swift comile message to check preview for the compile errors - when I click on preview the page is blank a

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

if result == 0 { let isPerfectMultiple = true } else { let isPerfectMultiple = false }

what is the issue?

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

if result == 0 {
    let isPerfectMultiple = true
} else {
    let isPerfectMultiple = false
}

3 Answers

Nichlas Kondrup
Nichlas Kondrup
17,748 Points
Nichlas Kondrup
Nichlas Kondrup
17,748 Points

You don't have use an if-else statement. You can simply say that the calculation should return 0 

// 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 
let isPerfectMultiple = value % divisor == 0
Bill Tihen
Bill Tihen
17,790 Points
Bill Tihen
Bill Tihen
17,790 Points

OK thanks - that works. But why do I get a compile error on my code (without any error)? I don't get a compile error in xcode nor in ibm's swiftlang site

Nichlas Kondrup
Nichlas Kondrup
17,748 Points
Nichlas Kondrup
Nichlas Kondrup
17,748 Points

I guess it's because you have two different constants both named isPerfectMultiple. If you want to use an if-else statement you can write like this:

// 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
let isPerfectMultiple: Bool

if result == 0 {
    isPerfectMultiple = true
} else {
    isPerfectMultiple = false
}
Bill Tihen
Bill Tihen
17,790 Points
Bill Tihen
Bill Tihen
17,790 Points

Ah cool - that is what I was overlooking.