> For the complete documentation index, see [llms.txt](https://voyz.gitbook.io/voyz-algorithm/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://voyz.gitbook.io/voyz-algorithm/lian-biao/lian-biao-dao-shu-di-k-ge-jie-dian.md).

# 链表倒数第 k 个节点

## 剑指 Offer 22. 链表中倒数第 k 个节点

### 题目

```
输入一个链表，输出该链表中倒数第k个节点。为了符合大多数人的习惯，本题从1开始计数，即链表的尾节点是倒数第1个节点。例如，一个链表有6个节点，从头节点开始，它们的值依次是1、2、3、4、5、6。这个链表的倒数第3个节点是值为4的节点。



示例：

给定一个链表: 1->2->3->4->5, 和 k = 2.

返回链表 4->5.

相关标签
链表
双指针
```

### 题解

#### 双指针

```javascript
/**
 * Definition for singly-linked list.
 * function ListNode(val) {
 *     this.val = val;
 *     this.next = null;
 * }
 */
/**
 * @param {ListNode} head
 * @param {number} k
 * @return {ListNode}
 */
var getKthFromEnd = function(head, k) {
    let _left = head,
        _right = head;

    for(let i=0;i<k;i++){
        _right = _right.next
    }

    while(_right !== null){
        _left = _left.next;
        _right = _right.next;
    }

    return _left;
};
```


---

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