OR列表 statement1 || statement2 || statement3 || …:允许执行一系列命令直到有一条命令成功为止,其后所有命令将不再被执行 #!/bin/sh 代码: touch file_one rm -f file_two if [ -f file_one ] && echo "hello" && [ -f file_two ] && echo " there" then echo "in if" else echo "in...
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...
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…elif…else…fi语句 1、if…else语句 代码语言:javascript 代码运行次数:0 运行 AI代码解释 if[expression]thenStatement(s)to be executedifexpression istruefi 注意:expression 和方括号([ ])之间必须有空格,否则会有语法错误。 if…else也可以写成一行,以命令的方式来运行,像这样: 代码语言:javascript 代码...
The first thing the if statement does is evaluate the expression in parentheses. 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...
New-CMTSStepRunPowerShellScript -Name <String> [-SuccessCode <Int32[]>] [-Condition <IResultObject[]>] [-ContinueOnError] [-Description <String>] [-Disable] [-DisableWildcardHandling] [-ForceWildcardHandling] [-WhatIf] [-Confirm] [<CommonParameters>]Power...
运行if语句时,PowerShell 会将<test1>条件表达式计算为 true 或 false。 如果<test1>为 true,<statement list 1>则运行,PowerShell 退出 语句if。 如果<test1>为 false,则 PowerShell 将计算条件语句指定的<test2>条件。 有关布尔计算的详细信息,请参阅about_Booleans。
Compare two mailbox users directly in compare-object scriptblock compare two strings in if-then-else statement Compare two text files in Powershell and if a name is found in both files output content from file 2 to a 3rd text file Compare-Object : Cannot bind argument to parameter 'Referenc...
SQL Shell自动将在终端会话期间发出的每个成功的SQL语句存储在本地缓存中,并为其分配一个顺序号。这些数字用于在当前Terminal过程中重新调用以前的SQL语句。 SQL Shell仅将数字分配给成功的SQL语句。如果在准备SQL语句期间发生错误,则不会分配任何编号。这些数字分配不是
a finite set of choices: if you display a message box that contains onlyYesandNobuttons, well, at that point it’s difficult for the user to choose anything other than Yes or No. Of course (wink wink), that’smuchharder to do in a console-based Windows PowerShell script, isn’t it...