Shell的输入输出

通过使用read命令，可以实现从终端中输入内容后输出或执行运算

1 #!/bin/bash
2 #Author: blacksonny
3 #Copyright (c)
4 #Script follows here:
5 
6 echo "How old are you?"
7 read age
8 echo "age is " $age

以上代码会首先输出一个 [How old are yoy？]，这时终端等待输入，当我们输入18这个数字(会将18赋值给age)并键入回车后，屏幕输出结果为age is 18

如下运行结果：

kk@kk-pc ~/shell
$ sh ./inout.sh
How old are you?
18
age is  18