If-statement-Bash-Script-Example if-else Statement 除了普通的 if 语句之外,我们还可以用 else 块扩展 if 语句。基本思想是,如果语句为真,则执行 if 块。如果语句为假,则执行 else 块。 Syntax : if [ condition_command ] then command1 command2 …….. last_command else command1 command2 …….. ...
如果 condition1 成立，那么就执行 if 后边的 statement1；如果 condition1 不成立，那么继续执行 elif，...
if 语句通过关系运算符判断表达式的真假来决定执行哪个分支。 Shell 有三种 if ... else 语句: if ... fi 语句; if ... else ... fi 语句; if ... elif ... else ... fi 语句。 语法格式: if [ expression ] then Statement(s) to be executed if expression is true fi ## 注意, expressio...
echo"$1 是通的"elseecho"$1 是不通的"fi#方法二:将ip直接写脚本里#vi ifelseDemo2.sh#!/bin/bashif`ping -c 3 106.53.73.200 &> /dev/null`;then echo"通的"elseecho"不通"fi 2.1.3 if多分支语句 多分支语句结构由if、then、else、elif、fi关键词组成,进行多次条件匹配,匹配成功则执行对应的预...
A shell script is a series of commands written in a file; the shell reads the commands from the file just as it would if you typed them into a terminal. 如果你能在 shell 中输入命令,你就能编写 shell 脚本(也称为 Bourne shell 脚本)。 shell 脚本是写在文件中的一系列命令;shell 会从文件...
在C Shell脚本中,if语句用于根据条件执行不同的代码块。if语句的语法如下: ``` if (表达式) then # 执行语句块1 else if (表达式) then #...
In this example, the script first checks if ‘a’ is greater than ‘b’. If it’s not, it moves on to the ‘elif’ statement to check if ‘a’ is greater than ‘c’. If neither condition is met, it executes the ‘else’ statement, which in this case, prints ‘a is not greate...
If it evaluates to $true, then it executes the scriptblock in the braces. If the value was $false, then it would skip over that scriptblock. In the previous example, the if statement was just evaluating the $condition variable. It was $true and would have executed the Write-Output ...
8 shell if elif else 2019-12-19 18:59 −if 语句的判断条件,从本质上讲,判断的就是命令的退出状态。 语句语句格式同一行书写注意点用例1用例2 if 语句 if conditionthen statement(s)fi if condition; then statement(s)... 声声慢43 0 590 ...
New-CMTSStepRunPowerShellScript -Name <String> [-SuccessCode <Int32[]>] [-Condition <IResultObject[]>] [-ContinueOnError] [-Description <String>] [-Disable] [-DisableWildcardHandling] [-ForceWildcardHandling] [-WhatIf] [-Confirm] [<CommonParameters>]Power...