# 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...
Value returned by function is: 10return后面不跟参数,只用于返回也是可以的。function name { commands return }全局变量和局部变量,local 命令Bash 函数体内直接声明的变量,属于全局变量,整个脚本都可以读取。这一点需要特别小心。# 脚本 test.sh fn () { foo=1 echo "fn: foo = $foo" } fn echo "globa...
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/bin/sh, ShellCheck will warn about portability issues similar tocheckbashisms: echo{1..$n}# Works in ksh, but not bash/dash/shecho{1..10}# Works in ksh and bash, but not dash/shecho-n 42# Works in ksh, bash and dash, undefined in shexpr match str regex# Unportable alias for...
function check_digits() { if [[ "$1" =~ [0-9] ]]; then echo "All digits." else echo "Not all digits." fi } check_digits "$1" 这个脚本在=~操作符右边提供的正则表达式是[0-9],对应 0 到 9 之间任意一个数字,但是只对应一个数字。
For example, a bash function return value is limited to number values between 0 and 255, nor can you safely use indirection in bash. This example will implement a rand function and a shuffle function. Both functions use local and global variables to pass values around. If you need to ...
Bash - Function Bash - process Bash - Flow statement (Control Structure) Syntax return [n] Copy Bash Download If used: inside a function. Return value specified by n. If n is omitted, the return status is that of the last command executed in the function body. outside a function, ...
function hide_all PressReturnand in the new line created type { Use thedown arrowkey to move the cursor down to the line below the “Defaults…FALSE” line and pressReturn. In the new line created type } Then pressReturn. Type function show_all ...
函数function的语法: 语法结构: (1) function函数名{ 函数体 } (2)函数名() { 函数体 } 调用函数:函数名例:checkUser centos [checkUser为函数名centos为传入的参数] 函数的返回值: 函数执行过程结果向调用者的回馈; (a)显式使用echo或printf命令; ...
#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 1. 2. 3. 4. 5. 6. 7. 8. 9. ...