光阴似箭催人老，日月如移越少年。
``This is generally used to enclose some instructions. addarray is a function. Of course, you cannot do this. It is declared by you yourself/
`` is to execute the instructions inside you, such as
function f1{
ehco "test"
}
f1_ret=f1
f1
The terminal will prompt you that test not found, but it actually executes the f1 function -bash: test: command not found
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
``This is generally used to enclose some instructions.
addarray is a function. Of course, you cannot do this. It is declared by you yourself/
`` is to execute the instructions inside you, such as
function f1
{
}
f1_ret=
f1The terminal will prompt you that test not found, but it actually executes the f1 function
-bash: test: command not found