If File exists then copy it script powershell If is not recognized as the name of a cmdlet? if not contains If statement based on day of the week evaluating despite being false If Test-Connection do these action else exit. If variable is null or empty skip in script If with multiple co...
代码语言:txt 复制 if (statement1) { # 执行语句1 } elseif (statement2) { # 执行语句2 } else { # 执行其他操作 } 在这个例子中,statement1和statement2是两个逻辑表达式,可以是任何返回布尔值的表达式。根据这两个语句的结果,程序将执行相应的代码块。 以下是对问题中提到的一些关键术语和概念的解释: ...
如果<test2>为 true,则<statement list 2>运行,并且 PowerShell 将退出if语句。 如果<test1>和<test2>的计算结果为 false,则<statement list 3> 代码块将运行,并且 PowerShell 将退出if语句。 可以使用多个elseif语句链接一系列条件测试。 仅当以前的所有测试均为 false 时,才会运行每个测试。 如果需要创建包含...
Theifstatement allows you to specify an action for not only when the statement is$true, but also for when it's$false. This is where theelsestatement comes into play. else Theelsestatement is always the last part of theifstatement when used. ...
似乎所有的条件语句都使用if...else...，它的作用可以简单地概括为非此即彼，满足条件A则执行A的语句，否则执行B语句，python的if...else...功能更加强大，在if和else之间添加数个elif,有更多的条件选择，其表达式如下:
2.2 If statement <ifStatementRule> = ‘if’ ‘(‘ <pipelineRule> ‘)’ <statementBlockRule>[ ‘elseif’ ‘(‘ <pipelineRule> ‘)’ <statementBlockRule> ]* [ ‘else’ <statementBlockRule> ]{0 |1} 2.3 Switch statement # The syntax for a switch statement looks like: ...
If else checking existence of homeDirectory in AD If File exists then copy it script powershell If is not recognized as the name of a cmdlet? if not contains If statement based on day of the week evaluating despite being false If Test-Connection do these action else exit. If variable is...
Ternary operator? <if-true> : <if-false> You can use the ternary operator as a replacement for theif-elsestatement in simple conditional cases. For more information, seeabout_If. Null-coalescing operator?? The null-coalescing operator??returns the value of its left-hand operand if it isn'...
If this function is run using the pipeline, it displays the following results: PowerShell Copy 1, 2, 4 | Get-PipelineBeginEnd Output Copy Begin: The input is End: The input is 1 2 4 When the begin statement runs, the function doesn't have the input from the pipeline. The end...
param($ComputerName= $(throw"ComputerName parameter is required."))functionCanPing {$Error.Clear()$tmp=Test-Connection$ComputerName-ErrorActionSilentlyContinueif(!$?) {Write-Host"Ping failed:$ComputerName.";return$false}else{Write-Host"Ping succeeded:$ComputerName";return$true} }functionCanRemote...