tered, an attemptismadetodefine afunctionusing``-f foo=bar'', an attempt is made to assign avaluetoareadonlyvariable, an attemptismadetoassign a valuetoan array variable withoutusingthe compound assignment syntax (see Arrays above), oneofthe namesisnota valid shell variable name, an attempti...
$n, corresponding to the position of the parameter after the function’s name.# The $0 variable is reserved for the function’s name.# The $# variable holds the number of positional parameters/arguments passed to the function.# The $* or $@ variable holds all positional parameters/arguments ...
my_function() {echo"Hello I'm a function";echo"Bye!"; } 2. Execute the function by entering the function's name in the terminal: my_function The output runs the commands in the function's body. The function only stays defined in the current terminal session. To save for future sessio...
2.3. Assign to Variable Notably, however, we can assign the result of the entire expression to another variable: $ y="${x:-default_value}"$echo"$y"default_value Theyvariable is assigned the result of the${x:-default_value}expression which, in this case, expands to thedefault_valuestring...
You can assign data to a variable using the equals sign (=). The data you store in a variable can either be a string or a number. Let’s create a variable now on the command line: chapter_number=5 The variable name is on the left hand side of the equals sign, and the data whic...
function bash { #Define bash local variable #This variable is local to bash function only local VAR="local variable" echo $VAR } echo $VAR bash # Note the bash global variable did not change # "local" is bash reserved word echo $VAR ...
如果函数将从测试结果中反馈输出,那么使用替换命令可保存结果。函数调用的替换格式为:variablename=functioname 六、创建函数文件 下面创建包容函数的函数文件并将之载入shell,进行测试,再做改动,之后再重新载入。函数文件名为functions.main,内容如下: #!/bin/sh ...
2. Execute the function by entering the function's name in the terminal: my_functionCopy The output runs the commands in the function's body. The function only stays defined in the current terminal session. To save for future sessions, add the code to the~/.bashrcfile. ...
To actually return an arbitrary value from a function, we need to use other methods. The simplest option is to assign the result of the function to a global variable: ~/return_values.sh #!/bin/bashmy_function(){func_result="some result"}my_functionecho$func_result ...
當使用 keyname:function-name 或macro 形式時, keyname 是按鍵以英文拼寫的名稱。例如: Control-u: universal-argument Meta-Rubout: backward-kill-word Control-o: "> output" 在上述例子中, C-u 被關聯到函數 universal-argument, M-DEL 被關聯到函數 backward-kill-word,而 C-o 被關聯 為運行右邊給...