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...
# syntax.sh# Declaring functions using the reserved word function# Multilinefunctionf1 {echoHello I\'m function 1 echo Bye! } # One line function f2 { echo Hello I\'mfunction2;echoBye!; }# Declaring functions without the function reserved word# Multilinef3() {echoHello I\'m function 3...
What is a bash function? How to define and use functions in Bash? Function Variables Function Arguments Function Return How to delete a function? Nested Functions How to debug a bash function? Get an existing function definition Tracing code with traps Find where a bash function is defined ...
function test_hello(){ if [[ "$1" -eq 1 ]];then echo "yes" return 0; fi echo "no"; return 1; } return1=`test_hello 1` echo "return code:$?,value=${return1}" return2=`test_hello 0` echo "return code:$?,value=${return2}" 虽然不是很方便. 但是基本也实现了我们的目标...
local VAR_NAME=VALUE 变量的替换方式: 前提:定义环境变量: export MYVAR=qhdlink 示例: #!/bin/bash #区别全局变量、本地变量、局部变量; testvar() { #local命令定义局部变量,只在局部有效; local MYVAR=chinalink echo "Internal function: $MYVAR" ...
${variable%pattern} # if the pattern matches the end of the variable's value, delete the shortest part that matches and return the rest ${variable%%pattern} # if the pattern matches the end of the variable's value, delete the longest part that matches and return the rest ...
/bin/bashfunctionmyFunc(){echo"Shell Scripting Is Fun!"}myFunc# call 同时脚本一样,也可以给函数传递参数完成特殊的任务,第一个参数存储在变量$1中,第二个参数存储在变量$2中,$@存储所有的参数,参数之间使用空格分割 myFunc param1 param2 param3......
declare OPTION VARIABLE=value • -a:声明数组变量。 • -i:声明整数变量。 • -l:声明变量为小写字母。 • -r:声明只读变量。 • -u:声明变量为大写字母。 作用域:Scope 默认都是全局变量 aa=“bb” 局部变量在function里面需要加local 局部变量:local a=99 在Shell 中定义的变量,默认就是全局变...
s>command[-pVv]command[arg ...]readonly[-af] [name[=value] ...] or> compgen [-abcdefgjksuv] [-o option] >return[n] complete [-abcdefgjksuv] [-pr] [-DE] >selectNAME [inWORDS ... ;]doCOMM> compopt [-o|+o option] [-DE] [name ..>set[--abefhkmnptuvxBCHP] [-o ...
export -f function_name 5.2、函数参数和返回值 (1)内建 local 函数: local 创建的变量只在函数内部使用,退出函数变量即实效。 (2)参数: 通过位置参量可以向函数传递参数,该参数不会影响函数外使用的任何位置参量。 (3)内建 return 函数: return 用来退出函数并返回到调用函数的地方。如果没有给 return 指定...