I don't know what is wrong with my code

[strange_fava]

Tell us what’s happening:
Describe your issue in detail here.

  **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));
}

abTest(2,2);

  **Your browser information:**

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.36 OPR/82.0.4227.58

Challenge: Return Early Pattern for Functions

Link to the challenge:

freeCodeCamp.org

[JeremyLT]

@strange_fava

Tell us what’s happening:
Describe your issue in detail here.

Hello there.

Do you have a question?

If so, please edit your post to include it in the Tell us what’s happening section.

Learning to describe problems is hard, but it is an important part of learning how to code.

Also, the more information you give us, the more likely we are to be able to help.

---

undefined is a keyword. You probably aren’t supposed to return a string.