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# AI solution for JavaScript Coding Question on BFE.dev 168. move zeros

One possible solution in JavaScript:

``````function moveZeros(arr) {
let i = 0;
for (let j = 0; j < arr.length; j++) {
if (arr[j] !== 0) {
arr[i] = arr[j];
i++;
}
}
for (let k = i; k < arr.length; k++) {
arr[k] = 0;
}
}
``````

The idea of this solution is to use two pointers `i` and `j` to traverse the array. The pointer `i` keeps track of the position where the next non-zero number should be placed, while `j` scans the array for non-zero numbers. When a non-zero number is found at position `j`, it is moved to position `i` and `i` is advanced. After the first loop, all non-zero numbers have been moved to the left side of the array, and the rest of the array is filled with zeros by a second loop from `i` to the end. This approach has a time complexity of O(n) and a space complexity of O(1), since it only modifies the input array without using extra space.