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。
Here is a basic example of the if statement: PowerShell Copy $condition = $true if ( $condition ) { Write-Output "The condition was true" } The first thing the if statement does is evaluate the expression in parentheses. If it evaluates to $true, then it executes the scriptblock in...
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 c...
elseif 与和else关键字一起使用if可指定其他条件。 关键字 (keyword)else是可选的。 语法: Syntax if (<condition>) {<statement list>} elseif (<condition>) {<statement list>} else {<statement list>} end 指定函数主体的一部分,以及dynamicparam、begin和end关键字。 语句end列表在...
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:
statement: | ... | ’return’ pipeline_chain [‘&’] | pipeline_chain [‘&’] pipeline_chain: | pipeline_chain ‘&&’ pipeline | pipeline_chain ‘||’ pipeline | pipeline pipeline: <as above> If we allow control flow statements, then you might have this: ...
connections, and to display personalized advertising based on your online activity. If you reject optional cookies, only cookies necessary to provide you the services will be used. You may change your selection by clicking “Manage Cookies” at the bottom of the page.Privacy StatementThird-Party ...
You use the exit statement in the PowerShell script to exit the script with a custom error code. You run the echo %errorlevel% command at the command prompt to retrieve the error code. In this situation, an incorrect ...
(it has 5 digits so the color is red, the part number starts with the letterdmeaning it was manufacturer in Des Moines, etc.). At other times – like this one – we’d really prefer that PowerShell find the first true condition and then exit the switch statement. But how do we do...
You use the exit statement in the PowerShell script to exit the script with a custom error code. You run the echo %errorlevel% command at the command prompt to retrieve the error code. In this situation, an incorrect e...