Syntax <condition> ? <if-true> : <if-false> 三元运算符的行为类似于简化if-else语句。 计算<condition>表达式,并将结果转换为布尔值,以确定接下来应计算哪个分支: 如果<condition>表达式为 true,则执行<if-true>表达式 如果<condition>表达式为 false,则执行<if-false>表达式 ...
在Powershell中,if条件语句用于根据条件的真假来执行不同的代码块。如果你发现if条件不起作用,可能有以下几个原因: 语法错误:请确保if条件语句的语法正确,包括正确的括号、运算符和变量名。例如,正确的if条件语句应该是if ($condition) { code },其中$condition是一个布尔表达式。 变量赋值问题:检查if条件中使用的...
キーワード (keyword)と共にif使用して、既定のステートメント リストを指定します。 構文: Syntax コピー if (<condition>) {<statement list>} else {<statement list>} elseif 追加の条件をif指定するために、キーワード (keyword)とelse共に使用されます。 else キーワード (keyword)は省...
If that is $false, then it moves down to the next elseif or else in the list. That last else is the default action to take if none of the others return $true. switch At this point, I need to mention the switch statement. It provides an alternate syntax for doing multiple ...
TheIfconstruct uses the following syntax: PowerShell If($freeSpace-le5GB) {Write-Host"Free disk space is less than 5 GB"}ElseIf($freeSpace-le10GB) {Write-Host"Free disk space is less than 10 GB"}Else{Write-Host"Free disk space is more than 10 GB"} ...
that exists as an object reference but does not require a name. The Where-Object and Foreach-Object Cmdlets rely on scriptblocks for their implementation. Scriptblocks are also known asanonymous functionsorlambda expressionsin other languages. A scriptblock is defined with the following syntax ...
$result = if(Get-Process -Name notepad) { "Running" } else { "Not running" } This technique is the equivalent of a ternary operator in other programming languages, or can form the basis of one if you’d like a more compact syntax. For more information about these flow control statement...
The type comparison operators (-is and -isnot) are used to determine if an object is a specific type. Syntax: PowerShell Copy -is <type-reference> -isnot <type-reference> Example: PowerShell Copy $a = 1 $b = "1" $a -is [int] # Output: True $a -is $b.GetType(...
about_Path_Syntax Describes full and relative path name formats in Windows PowerShell. about_Pipelines Explains how to combine commands into pipelines in Windows PowerShell. about_PowerShell.exe Displays help for the PowerShell.exe command-line tool. ...
service will use the first .exe file found in the package, have service name and service display name equal to the role name ("MyService" in our case). If you have more than one .exe in the package or want to customize Windows service details you can use extendedAdd-ServiceRolesyntax:...