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iOS Swift Basics Swift Operators Working With Operators

Posted by Parker Barandon
Parker Barandon
377 Points

Stuck on this challenge in Swift 3 basics

I'm confused as to why I keep getting this wrong... it is saying that I need to assign the result and not just a bool value. However, anything I try seems to come out as incorrect with the same result. Task 2 is the issue here, Task 1 is apparently fine.

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 = 200 % 5
// Task 2 - Enter your code below 
0 == 0
let isPerfectMultiple = true 

20 + 400 % 10 / 2 - 15 ≥ 52 * 27 % 200 / 2 + 5 
let isGreater: Bool = false
Josue Gisber
Josue Gisber
Courses Plus Student 9,332 Points
Josue Gisber
Josue Gisber
Courses Plus Student 9,332 Points

Ok, firstable, the first task is ok. Secondable, on the second task you are not following what the instructions says which is to compare the value of results to 0 and assign that value the constant isPerfectMultiple [ let isPerfectMultiple = result == 0]

1 Answer

Jack Baer
Jack Baer
5,049 Points
Jack Baer
Jack Baer
5,049 Points

You are not doing what the tasks are asking. You need to call upon variables in your operations. You just typed

let result = 200 % 5, when what you need to do is type

let result = value % divisor.

Then, you aren't the correct value to isPerfectMultiple. You just did

0 == 0 let isPerfectMultiple = true

0 == 0

literally does nothing

let isPerfectMultiple = true

only assigns true to it, once again not using variable names.

Then you just wrote out the operations and compared them, which is once again a useless statement. And once again, you set isGreater to true, not using variable names.

What you need to have is:

// 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 = result == 0

// Task 2 - Enter your code below let isGreater = someOperation >= anotherOperation

Your problem is that you need to call upon your variables. Imagine a variable as a box. You put a value in, put a label on that box, and can access its contents using the label name. The name in declaration, such as result, is the label. The contents are the values put inside, so 200 and 5 in the value and divisor variables.

Notice how in my result, isPerfectMultiple, and isGreater declarations, the assigned value is using operators and variable names, not values like 200 or 5.

let result = value % divisor

is the exact same as

let result = 200 % 5

except if you changed the contents of value or divisor later on, the code would fail in the bottom until you manually changed it.

Hope this helps. ~Jack