// Given an array nums, write a function to move all 0's to the end of it while maintaining the relative order of the non-zero elements.

// For example, given nums = [0, 1, 0, 3, 12], after calling your function, nums should be [1, 3, 12, 0, 0].

// Note:

// You must do this in-place without making a copy of the array.

// Minimize the total number of operations.

public class Solution {

public void moveZeroes(int[] nums) {

if(nums == null || nums.length == 0) return;

int index = 0;

for(int num : nums) {

if(num != 0) {

nums[index] = num;

index++;

}

}

while(index < nums.length) {

nums[index] = 0;

index++;

}

}

}