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$ curl repovive.com/roadmaps/meta-interview-prep-v2/coding-patterns-i-arrays-strings-stacks/leetcode-283-move-zeroes-implementation

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LeetCode 283 Move Zeroes - Implementation - Coding Patterns I: Arrays, Strings & Stacks | Meta Interview Prep | Repovive

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LeetCode 283 Move Zeroes - Implementation

The approach

function moveZeroes(nums):
    write = 0
    for i in range(len(nums)):
        if nums[i] != 0:
            nums[write], nums[i] = nums[i], nums[write]
            write += 1

The swap approach processes each element once. When nums[i] is non-zero, it lands at position write and write advances. Zeroes get pushed right without any extra pass. If write equals i, the swap is a no-op, so you don't waste time.

$O(n)$ time, $O(1)$ space.