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Single Number (easy)
Problem Statement
In a non-empty array of integers, every number appears twice except for one, find that single number.
Example 1:
Input: 1, 4, 2, 1, 3, 2, 3
Output: 4
Example 2:
Input: 7, 9, 7
Output: 9
Constraints:
- 1 <= nums.length <= 3 * 10<sup>4</sup>
- -3 * 10<sup>4</sup> <= nums[i] <= 3 * 10<sup>4</sup>
- Each element in the array appears
twice
except for one element which appears only once.
Try it yourself
Try solving this question here:
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