Linux|shell——全局变量与局部变量 Linux|shell

变量的作用域一、全局变量：任何地方都生效的变量，默认情况下，脚本主体内定义全局变量，函数内可以用，函数外也可以用

[root@server ~]# vim overall.sh #!/bin/bashfunction fun1() { temp=$[ $value + 5 ] result=$[ $temp * 2 ] }temp=4 value=https://www.it610.com/article/6fun1echo"The result is $result" if [ $temp -gt $value ]; then echo "temp is larger" else echo "temp is smaller" fi [root@server ~]# sh overall.sh The result is 22 temp is larger

【Linux|shell——全局变量与局部变量】二、局部变量：

定义方法： local value

[root@server ~]# vim local.sh #!/bin/bashfunction fun1() { local temp=$[ $value + 5 ] result=$[ $temp * 2 ] }temp=4 value=https://www.it610.com/article/6fun1echo"The result is $result" if [ $temp -gt $value ]; then echo "temp is larger" else echo "temp is smaller" fi [root@server ~]# sh local.sh The result is 22 temp is smaller