# 2.4.9 向量类型

向量是可以引用任何 Lisp 对象的一维数组。向量的查找时间同样为常数时间。（在列表中，查找时间和列表的位置成正比。）

向量的打印表示为一个左中括号、元素，以及右中括号。这同时也是它的读取语法。和数字，字符串一样，向量也是自求值的常数。

```
[1 "two" (three)]        ; 一个 3 元素 向量
    => [1 "two" (three)]
```

查看向量章节，以获取和向量相关的函数。


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://emacs-lisp.ivory.cafe/lisp-shu-ju-lei-xing/bian-cheng-lei-xing/2.4.9-xiang-liang-lei-xing.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.