> For the complete documentation index, see [llms.txt](https://huataihuang.gitbook.io/cloud-atlas-draft/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://huataihuang.gitbook.io/cloud-atlas-draft/develop/shell/bash/exit_a_function_in_bash.md).

# 从函数返回

在Shell中，会使用

```bash
fuction func_1(){
    ....
}
```

如果在`function`中，有某些判断后结束function不再执行后面部分，例如：

```bash
# Start script
Do scripty stuff here
Ok now lets call FUNCT
FUNCT
Here is A to come back to

function FUNCT {
  if [ blah is false ]; then
    exit the function and go up to A
  else
    keep running the function
  fi
}
```

则应该使用`return [n]`方法，从`help return`可以看到：

`return`可以从一个shell函数中返回指定的`n`数值。如果没有指定`n`，则返回值是函数或脚本最后执行命令的返回值。

## 参考

* [How to exit a function in bash](https://stackoverflow.com/questions/18042279/how-to-exit-a-function-in-bash)