# Missing Number Given an array `nums` containing `n` distinct numbers in the range `[0, n]`, return *the only number in the range that is missing from the array.* --- ### Examples **Example 1:** ```text Input: nums = [3,0,1] Output: 2 Explanation: n = 3 since there are 3 numbers, so all numbers are in the range [0,3]. 2 is the missing number in the range since it does not appear in nums. ``` **Example 2:** ```text Input: nums = [0,1] Output: 2 Explanation: n = 2 since there are 2 numbers, so all numbers are in the range [0,2]. 2 is the missing number in the range since it does not appear in nums. ``` --- ### Constraints * `n == nums.length` * `1 <= n <= 10^4` * `0 <= nums[i] <= n` * All the numbers of `nums` are **unique**.