> For the complete documentation index, see [llms.txt](https://gitbook.existorlive.cn/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://gitbook.existorlive.cn/kai-fa-yu-yan-xue-xi/shell/shell-shu-ru-shu-chu.md).

# Shell输入输出

### 1. echo

`echo` 输出变量，并自动换行

### 2. printf

格式化输出`printf format-string [arguments...]`\
​

```shell
 
printf "%-10s %-8s %-4s\n" 姓名 性别 体重kg  
printf "%-10s %-8s %-4.2f\n" 郭靖 男 66.1234
printf "%-10s %-8s %-4.2f\n" 杨过 男 48.6543
printf "%-10s %-8s %-4.2f\n" 郭芙 女 47.9876

:<<'
姓名     性别   体重kg
郭靖     男      66.12
杨过     男      48.65
郭芙     女      47.99
'
```

### 3. read

```shell
# 从标准输入读取，赋值给name
read name 
```