更新时间:2022-06-27 02:41:38
有两种典型的函数声明方式.我更喜欢第二种方法.
There are two typical ways of declaring a function. I prefer the second approach.
function function_name {
command...
}
或
function_name () {
command...
}
调用带参数的函数:
function_name "$arg1" "$arg2"
该函数通过它们的位置(而不是名称)来引用传递的参数,即 $1
、$2
等等.$0
是脚本本身的名称.
The function refers to passed arguments by their position (not by name), that is $1
, $2
, and so forth. $0
is the name of the script itself.
示例:
function_name () {
echo "Parameter #1 is $1"
}
此外,您需要在声明函数之后调用它.
Also, you need to call your function after it is declared.
#!/usr/bin/env sh
foo 1 # this will fail because foo has not been declared yet.
foo() {
echo "Parameter #1 is $1"
}
foo 2 # this will work.
输出:
./myScript.sh: line 2: foo: command not found
Parameter #1 is 2