Link to challenge:

Solution:

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

Could someone please explain to me the following code:

```
for (let j = 1; j < arr[i].length; j++)
```

Why is `j = 1`

?

Thanks in advance.