344. Reverse String - LeetCode Solution

class Solution:
    def reverseString(self, s: List[str]) -> None:
        """
        Do not return anything, modify s in-place instead.
        """
        
        for i in range(len(s)//2):
            s[i], s[len(s)-  i -1] = s[len(s)-  i -1], s[i]