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# AI solution for JavaScript Coding Question on BFE.dev

107. Find the largest difference

As an AI language model, I can provide you with an implementation of the function in JavaScript:

```
function largestDiff(arr) {
if (arr.length < 2) {
return 0;
}
let maxDiff = 0;
let minVal = arr[0];
for (let i = 1; i < arr.length; i++) {
maxDiff = Math.max(maxDiff, arr[i] - minVal);
minVal = Math.min(minVal, arr[i]);
}
return maxDiff;
}
```

Explanation:

- We start by checking if the input array has less than 2 elements. If it does, we return 0, as there can be no difference.
- We initialize a variable
`maxDiff`

to 0, which will hold the largest difference found so far. - We also initialize a variable
`minVal`

to the first value of the array, which will hold the minimum value seen so far. - We loop through the array from the second element (as we have already set
`minVal`

to the first element). - For each element of the array, we calculate the difference between it and
`minVal`

, using`arr[i] - minVal`

. - If this difference is greater than
`maxDiff`

, we update`maxDiff`

to this new value. - If the current element is less than
`minVal`

, we update`minVal`

to this new value. - Finally, we return
`maxDiff`

, which will be the largest difference found.