最简单的if语句包含单个命令,不包含任何elseif语句或任何else语句。 以下示例显示了 语句的最简单形式if: PowerShell if($a-gt2) {Write-Host"The value$ais greater than 2."} 在此示例中,如果$a变量大于2,则条件的计算结果为 true,并且语句列表将运行。 但是,如果$a小于或等于2或不是现有变量,则if语句不...
三元运算符? <if-true> : <if-false> 在简单条件情况下,可以使用三元运算符来替换if-else语句。 有关详细信息,请参阅about_If。 Null 合并操作符?? 如果null 合并运算符??不为 null,则它返回其左操作数的值。 否则,它将计算右操作数并返回其结果。 如果左操作数的计算结果为非 null,则??运算符不会计...
how can I check if variable is a letter or number? How can I check to see if a specific Windows Feature is installed on 2008 R2? How can I compute the number of fields in a CSV file that does not contain a header ? How can i conver .exe to ps1 for updating some more codes? H...
if(num−gt100)"1"elseif( num -eq 100){"0"} else {"-1"} PowerShell条件判断【switch语句】 代码语言:javascript 代码运行次数:0 运行 AI代码解释 $number = 49 switch($number) { {$_ -le 50} {"此数值小于50"} {$_ -eq 50} {"此数值等于50"} {$_ -gt 50} {"此数值大于50"} }...
$variable = "value" switch ($variable) { "value1", "value2" { # 执行操作1 break } "value3", "value4" { # 执行操作2 break } default { # 默认操作 break } } 在上述示例中,$variable变量的值将与每个case语句中的值进行匹配。如果匹配成功,则执行相应的操作。如果没有匹配到任何值,则执...
$addPath='c:\add\you\path\here';$target='User';$path= [Environment]::GetEnvironmentVariable('Path',$target);if($path-match";$"){$newPath=$path+$addPath; }else{$newPath=$path+';'+$addPath; } [Environment]::SetEnvironmentVariable('Path',$newPath,$target) ...
BUILD_BUILDNUMBER = "Build HelloWorld_0000.00.00.0"'exit1}# Make sure path to source code directory is availableif(-not$Env:BUILD_SOURCESDIRECTORY) {Write-Error("BUILD_SOURCESDIRECTORY environment variable is missing.")exit1}elseif(-not(Test-Path$Env:BUILD_SOURCESDIRECTORY)) {Write-Error"BUILD...
PowerShell 复制 # create mutable value type PS> Add-Type 'public struct Foo { public int x; }' # Create an instance and store it in a variable first # and then modify its property via the variable. PS> $var = [Foo]::new() PS> $var.x = 1 PS> $var.x 1 ...
When you run the function, the value you supply for a parameter is assigned to a variable that contains the parameter name. The value of that variable can be used in the function. The following example is a function calledGet-SmallFiles. This function has a$Sizeparameter. The function displa...
Set-PSReadLineOption-Colors@{ Command ='Magenta'Number ='DarkGray'Member ='DarkGray'Operator ='DarkGray'Type ='DarkGray'Variable ='DarkGreen'Parameter ='DarkGreen'ContinuationPrompt ='DarkGray'Default ='DarkGray'} 示例5:设置多种类型的颜色值 ...