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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.