Hello fellow campers,

I would like to find out the difference between the following codes , thank you!:

//This is my code which is wrong because it does not satisfy : abTest(-2,2) should return undefined

```
function abTest(a, b) {
// Only change code below this line
if (a < 0, b < 0 ) // HOW IS THIS LINE BEING INTERPRETED W/ A COMMA INSTEAD OF A "||"
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);
```

// **SPOILER ALERT**

// This is the right code

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);