**I have trouble with this challenge. I checked solutions on the forum and everyone seemed to do the same as what I did. Yet when I run the test I get the following error message:

```
// running tests
abTest(-2,2) should return undefined
abTest(2,-2) should return undefined
// tests completed
```

Does anyone have any idea what I might do wrong?

Thanks a lot! **

**Your code so far**

```
// Setup
function abTest(a, b) {
// Only change code below this line
if (a<0 || b<0) {
return "undefined";
}
// Only change code above this line
return Math.round(Math.pow(Math.sqrt(a) + Math.sqrt(b), 2));
}
// Change values below to test your code
abTest(2,2);
```

**Your browser information:**

User Agent is: `Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/12.1.1 Safari/605.1.15`

.

**Link to the challenge:**

https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/basic-javascript/return-early-pattern-for-functions/