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# [344\. Reverse String](https://leetcode.com/problems/reverse-string/)
## Description
Difficulty: **Easy**
Related Topics: [Two Pointers](https://leetcode.com/tag/two-pointers/), [String](https://leetcode.com/tag/string/), [Recursion](https://leetcode.com/tag/recursion/)
Write a function that reverses a string. The input string is given as an array of characters `s`.
You must do this by modifying the input array with `O(1)` extra memory.
**Example 1:**
\```
Input: s = ["h","e","l","l","o"]
Output: ["o","l","l","e","h"]
\```
**Example 2:**
\```
Input: s = ["H","a","n","n","a","h"]
Output: ["h","a","n","n","a","H"]
\```
**Constraints:**
* 1 <= s.length <= 10<sup>5</sup>
* `s[i]` is a .
## Solution
Language: **JavaScript**
\```javascript
/**
* @param {string} s
* @return {string}
*/
var reverseString = function(s) {
return s.split('').reverse().join('');
};
\```https://chrome.google.com/webstore/detail/leetcode-helper/gleoepapfjkpcijfmchfabbnldejdnoj
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