Single Number

1. Title

Single Number

2.   Http address

https://leetcode.com/problems/single-number/

3. The question

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

4. My code (AC)

    //Accepted
      public int singleNumber(int[] nums) {
         
          int re = 0;
          int len = nums.length;
          for(int i = 0 ; i < len ;i++)
          {
              re ^= nums[i];
          }
          return re;
        }