param="Null"functionvarfield { localparam="abc"#param="123" # 改写Outer-param的值echo"In the function: param=[$param]"} varfield echo"Out of function: param=[$param]" 关于数组做实参、数组作返回值 array=(5 4 3 2 1) echo"The original array is: ${array[*]}"functionarray_add { lo...
A function does not execute when declared. The function's body executes when invoked after declaration. Follow the steps below to create a bash script with various syntax options: 1. Using your favorite text editor, create a shell script calledsyntax. If you're using Vim, run the following ...
#!/bin/bash # 使用 function 关键字定义函数 function greet { echo "Hello, World!" } # 直接使用函数名定义函数 bye() { echo "Goodbye!" } 调用函数:使用函数名后跟一对 () 来调用函数。 #!/bin/bash greet # 调用 greet 函数 bye # 调用 bye 函数 函数参数:函数可以接受参数,参数通过 $1、...
($3+$4)) echo "sum is $sum" } param_function A B 2 3 5 # output: Hello World # parameter 1: A # parameter 2: B # parameters : A B 2 3 5 7 # sum is 5 # 可以看到, 即使函数内没使用参数也可以传递, 若使用了不存在的参数, 如 $4, 则默认为空 (不是空格) print_Hello2(...
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# The script is:function_name() {echo"the function is called"echo'$0 is'$0echo'$1 is'$1echo'$2 is'$2echo'$# is'$#echo'$*'is $*echo'$@'is$@} function_name first second third# The result is:thefunctionis called$0is ./bash_ex.sh$1is first$2is second$#is 3 ...
function DEBUG() { [ "$_DEBUG" == "on" ] && $@ || : } for i in {1..10} do DEBUG echo $i done ~ [root@cai shell]# _DEBUG=on ./DEBUG.sh 1 2 3 4 5 6 7 8 9 10 我们在每一个需要打印调试信息的语句前加上DEBUG。如果没有把_DEBUG=on传递给脚本,那么调试信息就不会被打印...
my_function() { echo "This is my function." read -p "Please enter your name: " name echo "Hello, $name!" } 在上面的例子中,read命令使用-p选项显示提示信息,并将用户输入的值赋给变量name。 调用函数,例如: 代码语言:txt 复制 my_function 当调用函数时,read命令会等待用户输入,并将输入的值赋...
Please note that which nvm will not work, since nvm is a sourced shell function, not an executable binary.Note: On Linux, after running the install script, if you get nvm: command not found or see no feedback from your terminal after you type command -v nvm, simply close your current...
We can call this bash function by name once we use it inside a script. #!/bin/bash welcome () { guests=(jessica jhon dwain sian rose mary jake123 sam303) echo "Write an array inside a Function" for i in "${guests[@]}" do echo "Welcome $i as a guest!" done } welcome ...