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Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today. # This wasnt taught in the tutorial! What? Remainder operator?

What is this about? I looked online but without seeing it used in the tutorial... im not sure how it is to be written out.

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

```

Hey Daniel,

The challenge is referring to the modulo operator — which is the percent (%) sign. The modulo operator's function is to divide two numbers — but instead of returning the result of the division — it returns the remainder.

The challenge asks you to find the remainder of value and divisor and assign the result to a constant named result:

```// Enter your code below
let value = 200
let divisor = 5
let result = value % divisor
```

Then it asks you to store a boolean value — whether or not the result was zero, meaning there was no remainder — in a constant named isPerfectMultiple:

```// Enter your code below
let value = 200
let divisor = 5
let result = value % divisor
let isPerfectMultiple = result == 0
```

What error are you getting? Where are you getting the error? In Xcode? Workspaces?