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。
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 conditions If/then statement in Powershell Ignore open files when running compress-archive ignore warning in powershell...
<statement> {-and | -or | -xor} <statement> {! | -not} <statement> 使用逻辑运算符的语句返回布尔值(TRUE 或 FALSE)。 PowerShell 逻辑运算符只计算确定语句的事实值所需的语句。 如果包含 and 运算符的语句中的左操作数为 FALSE,则不会计算右操作数。 如果包含 or 语句的语句中的左操作数为 TRUE...
Missing closing ')' after expression in 'if' statement. At line:154 char:1 } ~ Unexpected token '}' in expression or statement. CategoryInfo : ParserError: (:) [], ParentContainsErrorRecordException FullyQualifiedErrorId : MissingEndParenthesisAfterStatement $SystemList = Get-content ".\...
In PowerShell, theexitstatement sets the value of the$LASTEXITCODEvariable. In the Windows Command Shell (cmd.exe), the exit statement sets the value of the%ERRORLEVEL%environment variable. Any argument that is non-numeric or outside the platform-specific range is translated to the value of0...
if ($dtmDate) { Write-Host "Date selected: $dtmDate" } Here we’re using an if statement to determine whether or not $dtmDate has a value; if it doesn’t, that means the user pressed ESC. If it does have a value, then we simply echo back that value, like so: Copy 03/18...
Consequently, it will contain the previously set value, or $null if the variable hasn't been set. When referencing $Matches after invoking one of these operators, consider verifying that the variable was set by the current operator invocation using a condition statement. Example: PowerShell ...
match, theGet-ChildItemcommand returns nothing and assigns nothing to$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. ...
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PowerShell_Examples_v4.pdf- This two-page reference describes how to perform popular IT management and scripting tasks by using Windows PowerShell 4.0, including how to fetch data by using Management OData IIS Services, how to schedule jobs, how to add a #Requires statement to a script, and...