**Tell us what’s happening:**

I know that it is not taking the challenge `largestOfFour([[17, 23, 25, 12], [25, 7, 34, 48], [4, -10, 18, 21], [-72, -3, -17, -10]])`

should return `[25, 48, 21, -3]`

because of the negative numbers. Can someone help me understand how to change ‘var largestNumber = [0,0,0,0];’ so it takes a negative number? I tried ‘var largestNumber = [ ];’ and it did not work.

**Your code so far**

```
function largestOfFour(arr) {
var largestNumber = [0,0,0,0];
for(var arrayIndex = 0; arrayIndex < arr.length; arrayIndex++) {
for(var subArrayIndex = 0; subArrayIndex < arr[arrayIndex].length; subArrayIndex++) {
if(arr[arrayIndex][subArrayIndex] > largestNumber[arrayIndex]) {
largestNumber[arrayIndex] = arr[arrayIndex][subArrayIndex];
}
}
}
return largestNumber;
}
largestOfFour([[4, 5, 1, 3], [13, 27, 18, 26], [32, 35, 37, 39], [1000, 1001, 857, 1]]);
```

**Your browser information:**

User Agent is: `Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.131 Safari/537.36`

.

**Link to the challenge:**

https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/basic-algorithm-scripting/return-largest-numbers-in-arrays