This challenge is similar to the one before it the difference being doing it with multi dimenstions as supposed to just one.

Hence, I tried emulating a similar approach - doesn’t solve the challenge, can someone give me some pointers please?

**Your code so far**

```
function largestOfFour(arr) {
// You can do this!
var largestNumber = 0;
for (var row = 0 ; row < arr.length ; row++) {
for ( var col = 0 ; col>arr[row].length; col++) {
arr[row].split('');
if ( arr[row][col] > largestNumber) {
largestNumber = arr[row][col];
}
}
}
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 (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