> For the complete documentation index, see [llms.txt](https://imhuay.gitbook.io/studies/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://imhuay.gitbook.io/studies/algorithms/problems/2022/04/niu-ke-0103-jian-dan-fan-zhuan-zi-fu-chuan.md).

# 反转字符串

![last modify](https://img.shields.io/static/v1?label=last%20modify\&message=2022-10-14%2014%3A59%3A33\&color=yellowgreen\&style=flat-square) [![](https://img.shields.io/static/v1?label=\&message=%E7%AE%80%E5%8D%95\&color=yellow\&style=flat-square)](https://imhuay.gitbook.io/studies/algorithms/problems/2022/04/pages/R5NyOzkn3qAZy7wCx1pS#简单) [![](https://img.shields.io/static/v1?label=\&message=%E7%89%9B%E5%AE%A2\&color=green\&style=flat-square)](https://imhuay.gitbook.io/studies/algorithms/problems/2022/04/pages/R5NyOzkn3qAZy7wCx1pS#牛客) [![](https://img.shields.io/static/v1?label=\&message=%E5%AD%97%E7%AC%A6%E4%B8%B2\&color=blue\&style=flat-square)](https://imhuay.gitbook.io/studies/algorithms/problems/2022/04/pages/R5NyOzkn3qAZy7wCx1pS#字符串) [![](https://img.shields.io/static/v1?label=\&message=%E5%8F%8C%E6%8C%87%E9%92%88\&color=blue\&style=flat-square)](https://imhuay.gitbook.io/studies/algorithms/problems/2022/04/pages/R5NyOzkn3qAZy7wCx1pS#双指针)

> [反转字符串\_牛客题霸\_牛客网](https://www.nowcoder.com/practice/c3a6afee325e472386a1c4eb1ef987f3)

**问题简述**

```
写出一个程序，接受一个字符串，然后输出该字符串反转后的字符串。（字符串长度不超过1000）
```

**思路：双指针**

* 设置首尾双指针，交换字符，直到相遇；

<details>

<summary><strong>Python</strong></summary>

```python
class Solution:
    def solve(self , s: str) -> str:
        
        s = list(s)
        l, r = 0, len(s) - 1
        while l < r:
            s[l], s[r] = s[r], s[l]
            l += 1
            r -= 1
        
        return ''.join(s)
```

</details>