**Tell us what’s happening:**

Please help, I have use this code as well (i.e … if (a < 0 || b < 0) { return undefined; }) but again the system complained and gave error

**Your code so far**

```
// Setup
function abTest(a, b) {
// Only change code below this line
if (a < b){
console.log(a * b + 2);
}
else if (a === b) {
console.log(a * b * 2);
}
else if (a < 0 && b > 0 || 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 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36`

.

**Link to the challenge:**

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