function does not contain a return statement, its status is set based on the status of the last statement executed in the function. To actually return arbitrary values to the caller you must use other mechanisms. The simplest way to return a value from a bash function is to just set a gl...
. # The return statement terminates the function. # You can think of it as the function’s exit status. return 55}# assigning to the func_result variable using the $() mechanismfunc_result=$(greeting 'Joe')# console: return:55echo "return:$?"# console: func_result:Hello Joeec...
A function does not execute when declared. The function's body executes when invoked after declaration. Follow the steps below to create a bash script with various syntax options: 1. Using your favorite text editor, create a shell script calledsyntax. If you're using Vim, run the following ...
局部变量:作用域是函数的声明周期 定义:locale VARIABLE=VALUE 本地变量:作用域是运行脚本的shell的生命周期;作用范围是当前shell程序 a=VALUE // 全局变量: 环境变量: 全局变量和局部变量对比: #!/bin/bash name=tom setname() { local name=jerry echo "Function name:$name" } setname echo "Shell: $na...
Bash cannot return values, whether a single value or an array, but it can return a status (the same as other programs). However, there are multiple turnarounds that we can use to return an array from a function. Let’s explore them below. Using nameref Feature To return the entire ar...
Here, after the function was executed, our variablenumberremains untouched. This way, we also evade the return value limitation. BTW, a crude way of getting past the exit code in BASH is to use negative values. Linux, as the operating system, uses exit value 0 as the sign of successful...
return_value=$(python example.py)echo"Python脚本的返回值是:$return_value" 1. 2. 在这段代码中,return_value=$(python example.py)会运行example.py脚本,并将返回值保存在return_value变量中。然后,echo "Python脚本的返回值是:$return_value"会打印出Python脚本的返回值。
$ bash function_parameter.sh Go to top Pass Return Value from Function: Bash function can pass both numeric and string values. How you can pass a string value from the function is shown in the following example. Create a file named, ‘function_return.sh’ and add the following code. The...
Though, in a function, you can limit the scope of a variable by using the local builtin which support all the option from the declare builtin. The syntax for the local keyword is local [option] name[=value]. The local builtin makes a variable name visible only to the function and ...
name=VALUE 注意 Bash 对间距非常讲究:注意=前面没有空格,后面也没有。如果有空格,该命令将不起作用。 许多变量是由 shell 自己设置的,包括您已经看到的三个:HOME、PWD和PATH。除了两个小的例外,auto_resume和histchars,shell 设置的所有变量都是大写字母。 参数和选项 在命令后输入的单词是它的参数。这些单词...