**Tell us what’s happening:**

Because it is specified that sub-arrays will contain no more than 4 elements, after comparing every element of sub-arrays to the previous ones and landing on the last one that is assigned to “biggest” binding, i push that one into array of bigs.

But something’s not working. Could someone tell me what it is?

**Your code so far**

```
function largestOfFour(arr) {
// You can do this!
let biggest = 0;
let arrOfBigs = [];
for (let i = 0; i < arr.length; i++){
for (let j = 0; j < arr[i].length; j++){
if (arr[i][j] > biggest){
biggest = arr[i][j];
}
if ( j == 4) {
arrOfBigs.push(biggest);
}
}
}
return arrOfBigs;
}
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 (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-algorithm-scripting/return-largest-numbers-in-arrays