Missing Number

class Solution {
public:
    int missingNumber(vector<int>& nums) {
        int xorAll = nums.size();
        for (int i = 0; i < (int)nums.size(); ++i) {
            xorAll ^= i ^ nums[i];
        }
        return xorAll;
    }
};

func missingNumber(nums []int) int {
    xorAll := len(nums)
    for i, v := range nums {
        xorAll ^= i ^ v
    }
    return xorAll
}

from typing import List

class Solution:
    def missingNumber(self, nums: List[int]) -> int:
        xor_all = len(nums)
        for i, v in enumerate(nums):
            xor_all ^= i ^ v
        return xor_all

function missingNumber(nums) {
    let xorAll = nums.length;
    for (let i = 0; i < nums.length; i++) {
        xorAll ^= i ^ nums[i];
    }
    return xorAll;
}

class Solution {
    public int missingNumber(int[] nums) {
        int xorAll = nums.length;
        for (int i = 0; i < nums.length; i++) {
            xorAll ^= i ^ nums[i];
        }
        return xorAll;
    }
}

function missingNumber(nums: number[]): number {
    let xorAll = nums.length;
    for (let i = 0; i < nums.length; i++) {
        xorAll ^= i ^ nums[i];
    }
    return xorAll;
}