> For the complete documentation index, see [llms.txt](https://emacs-lisp.ivory.cafe/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://emacs-lisp.ivory.cafe/bian-liang.md).

# 变量

- [12 变量](https://emacs-lisp.ivory.cafe/bian-liang/12-bian-liang.md)
- [12.1 全局变量](https://emacs-lisp.ivory.cafe/bian-liang/untitled.md): 无处不在的永恒变量
- [12.2 常量变量](https://emacs-lisp.ivory.cafe/bian-liang/chang-liang-bian-liang.md)
- [12.3 局部变量](https://emacs-lisp.ivory.cafe/bian-liang/ju-bu-bian-liang.md)
- [12.4 无效（Void）变量](https://emacs-lisp.ivory.cafe/bian-liang/que-shi-bian-liang.md)
- [12.5 定义全局变量](https://emacs-lisp.ivory.cafe/bian-liang/ding-yi-bian-liang.md)
- [12.6 定义变量的建议](https://emacs-lisp.ivory.cafe/bian-liang/ding-yi-bian-liang-de-xiao-tie-shi.md)
- [12.7 变量获取](https://emacs-lisp.ivory.cafe/bian-liang/untitled-1.md)
- [12.8 变量设置](https://emacs-lisp.ivory.cafe/bian-liang/untitled-2.md)
- [12.9 变量监视](https://emacs-lisp.ivory.cafe/bian-liang/untitled-3.md): 当一个变量发生变化时，出发一个函数
- [12.9.1 限制](https://emacs-lisp.ivory.cafe/bian-liang/untitled-3/12.9.1-xian-zhi.md)
- [12.10 变量作用域规则](https://emacs-lisp.ivory.cafe/bian-liang/untitled-1-1.md)
- [Untitled](https://emacs-lisp.ivory.cafe/bian-liang/untitled-1-1/untitled.md)
- [12.10.1 动态绑定](https://emacs-lisp.ivory.cafe/bian-liang/untitled-1-1/12.10.1-dong-tai-bang-ding.md)
- [12.10.2 动态绑定的建议](https://emacs-lisp.ivory.cafe/bian-liang/untitled-1-1/12.10.2-dong-tai-bang-ding-de-jian-yi.md)
- [12.10.3 词法绑定](https://emacs-lisp.ivory.cafe/bian-liang/untitled-1-1/12.10.3-ci-fa-bang-ding.md)
- [12.10.4 如何正确的使用词法绑定](https://emacs-lisp.ivory.cafe/bian-liang/untitled-1-1/12.10.4-ru-he-zheng-que-de-shi-yong-ci-fa-bang-ding.md)
- [文件变量](https://emacs-lisp.ivory.cafe/bian-liang/wen-jian-bian-liang.md)
- [目录变量](https://emacs-lisp.ivory.cafe/bian-liang/mu-lu-bian-liang.md)
- [通信变量](https://emacs-lisp.ivory.cafe/bian-liang/tong-xin-bian-liang.md)
- [变量别名](https://emacs-lisp.ivory.cafe/bian-liang/bian-liang-bie-ming.md)
- [变量限制](https://emacs-lisp.ivory.cafe/bian-liang/bian-liang-xian-zhi.md)
- [泛型变量](https://emacs-lisp.ivory.cafe/bian-liang/fan-xing-bian-liang.md)