## Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

### Looking to learn something new?

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.

###### vibhukikani

2,864 Points# Second task is not passing though the answer is correct.

Enable to pass the second task in this challenge , the editor is not suggesting any error and the code is working as expected in playground.

Please advise. below is two answers I tried.

var mathFunction: (Int, Int) -> Int = differenceBetweenNumbers let difference = mathOperation(mathFunction,12,3)

AND

let difference = mathOperation(differenceBetweenNumbers,12,3)

```
/**
For this code challenge, let’s define a math operation as a function that
carries out some work on two integers and returns an integer as well. An
example is the function below, `differenceBetweenNumbers`, which takes two
integers and calculates the difference between the numbers. After calculating,
it returns the difference.
*/
func differenceBetweenNumbers(a: Int, b:Int) -> (Int) {
return a - b
}
// Enter your code below
func mathOperation(differenceBetweenNumbers:(Int,Int) -> (Int),a:Int,b:Int) -> (Int)
{
return differenceBetweenNumbers(a,b)
}
var mathFunction: (Int, Int) -> Int = differenceBetweenNumbers
let difference = mathOperation(mathFunction,12,3)
```

## 1 Answer

###### Caleb Kleveter

Treehouse Moderator 37,862 PointsTask 2:

```
// The type of “differenceBetweenNumbers" is (Int, Int) - > Int.
/*
- Now that we have a TYPE, we want to create a function that takes in
this TYPE of function as an argument in its parameter.
*/
func mathOperation(anyAddFunc: (Int, Int) -> Int, a: Int, b: Int) -> Int{
return anyAddFunc(a,b)
```

Task 3:

```
let difference = mathOperation(differenceBetweenNumbers, 2, 1)
```

This should work.