class Solution:
    def moveZeroes(self, nums: List[int]) -> None:
        """
        Do not return anything, modify nums in-place instead.
        """
        start, end = 0, 0
        while(end < len(nums)):
            if(nums[end] != 0): # != 0
                nums[start], nums[end] = nums[end], nums[start] # change
                start +=1
            end += 1

        return nums