**Tell us what’s happening:**

`function largestOfFour(arr) {

// You can do this!

var result = [];

for (var i = 0; i < arr.length; i++){

var largestNumber = 0;

for (var j = 0; j < arr[i].length; j++){

if (arr[i][j] > largestNumber){

largestNumber = arr[i][j];

}

}

result.push(largestNumber);

}

return result;

}

largestOfFour([[4, 5, 1, 3], [13, 27, 18, 26], [32, 35, 37, 39], [1000, 1001, 857, 1]]);`

**Your code so far**

```
`function largestOfFour(arr) {
// You can do this!
var result = [];
for (var i = 0; i < arr.length; i++){
var largestNumber = 0;
for (var j = 0; j < arr[i].length; j++){
if (arr[i][j] > largestNumber){
largestNumber = arr[i][j];
}
}
result.push(largestNumber);
}
return result;
}
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/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