# Leetcode 344. Reverse String
給定一個string的array將此array原地反轉

## 想法
### (1)使用python函式
python的list格式,預設有反轉list的函式

程式碼：

def reverseString(self, s: List[str]) -> None:
        """
        Do not return anything, modify s in-place instead.
        """
        s.reverse()

### (2)使用兩個指針的概念
將長度切為一半,逐一交換,得到最後結果

程式碼：
(1)使用for in

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

(2)使用while

def reverseString(self, s: List[str]) -> None:
        """
        Do not return anything, modify s in-place instead.
        """
        left = 0
        right = len(s)-1
        while(right>left):
            tag = s[left]
            s[left] = s[right]
            s[right] = tag
            left,right = left+1,right-1