Can you moves all zeros in array to end while maintaining the relative order of non-zero elements

Initialization:
j is initialized to 0. It represents the position where the next non-zero element will be placed.

Loop Through Array:
The for loop iterates through the array using i as the index.

Check for Non-Zero:
if (ar[i] !== 0): This checks if the current element ar[i] is not zero.

Swap Elements:
If ar[i] is not zero, it swaps the element at i with the element at j:
[ar[i], ar[j]] = [ar[j], ar[i]];
This ensures that non-zero elements are moved to the leftmost positions of the array.
Increment j:
After placing a non-zero element at j, increment j to point to the next position for the subsequent non-zero element.

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