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,则<statement list 1>运行,并且 PowerShell 将退出if语句。 如果<test1>为 false,PowerShell 将评估由<test2>条件语句指定的条件。 有关布尔评估的详细信息,请参阅about_Booleans。
if ( $age -le 13 -or $age -ge 55 ) Just like with the -and operator, the evaluation happens from left to right. Except that if the first part is $true, then the whole statement is $true and it doesn't process the rest of the expression. Also make note of how the syntax wor...
Yes, you can combine the or operator with other logical operators like and (-and) to create more complex conditions. What is the difference between -or and -and in PowerShell? The-oroperator returns true if at least one condition is true, while the-andoperator returns true only if all co...
Check if IIS running on a remote server check if object is $null Check if OS is 32bit or 64bit check If Process Is Running in another computer Check if SMB1 is enabled on the AD servers Check if string contains invalid characters Check if string starts with letter/character. check instal...
The if() statement highlights what I said in my previous post which is that the value held in the string, $Stat, is not implicitly converted to its Boolean equivalent. Rather, PowerShell sees some random old string and performs an existence - or "not null" - check. ...
if($value -match "^[0-9]+$"){ $valid = $true } return $valid } I can then use a if statement/block to test: $value = 4 if(isInt($value) -eq $true){ write-output "Valid" }else{ write-output "Invalid" } This correctly outputs “Valid”. If I change $value to a non-...
else {"Execution Statement3"} } Code: #2 $srv = Get-Service Spooler -ErrorAction Ignore if($srv){ if($srv.Status -eq "Running"){"Spooler Service is running"} else{"Spooler Service is not running"} } Else{ Write-Output "There is no service with name Spooler" ...
For example, the following function starts PowerShell with theRun as Administratoroption. PowerShell functionStart-PSAdmin{Start-ProcessPowerShell-VerbRunAs } To use the function, type:Start-PSAdmin To add statements to the function, type each statement on a separate line, or use a semicolon (;...
match, theGet-ChildItemcommand returns nothing and assigns nothing to$textFiles, which is considered$falsein a boolean context. If one or moreFileInfoobjects are assigned to$textFiles, the conditional evaluates to$true. You can work with the value of$textFilesin the body of theifstatement. ...
For example, you can use thethrowkeyword in the script block of anifstatement to respond to a condition or in thecatchblock of atry-catch-finallystatement. Thethrowkeyword can throw any object, such as a user message string or the object that caused the error. ...