Leetcode no. 136

136. Single Number

Given an array of integers, every element appears twice except for one. Find that single one.

Note:
Your algorithm should have a linear runtime complexity. Could you implement it without using extra memory?

public class Solution {
    public int singleNumber(int[] nums) {
        int res=0;
        for (int ele: nums){
            res ^= ele;
        }
        return res;
    }
}