# This statement returns true because book contains the string "oo" 'book' -match 'oo' 字元類別雖然字元常值可運作,但如果您知道確切的模式,字元類別可讓您較不明確。字元群組[character group] 可讓您一次比對任意數目的字元,而 [^character group] 只比對群組中的
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...
We have seen many conditions in if statement, like if($j -lt 10), But if we wanted to check multiple conditions at once, for example, $j -lt 10 and $i -lt 15 .So we have logical operators to tackle this kind of situation. Logical operators in PowerShell combine two or more expre...
This still works correctly in an if statement. So a value is returned by your operator, then the whole statement is $true. PowerShell Copy $array = 1..6 if ( $array -gt 3 ) { # do something } There's one small trap hiding in the details here that I need to point out. Whe...
If one or more FileInfo objects are assigned to $textFiles, the conditional evaluates to $true. You can work with the value of $textFiles in the body of the if statement. Note While this technique is convenient and concise, it can lead to confusion between the assignment operator (=) ...
Adding thecleanblock is a breaking change. Becausecleanis parsed as a keyword, it prevents users from directly calling a command namedcleanas the first statement in a script block. However, it's not likely to be a problem. You can still invoke the command using the call operator (& clean...
Windows PowerShell features a “numeric range” operator (..) that enables you to specify a range of numbers, something that can be very useful when dealing with arrays. Suppose we have an array with 100 items in it, and we need to echo back the value of items 37-79. If we want ...
Adding If/Else Conditional Logic You can also use the PowerShell Not Equal operator inside the conditional statements, such as the if/else statement. Related:Back to Basics: Conditional Logic with PowerShell If-Else For example, a service must be running in most cases if its StartType value ...
Ah, but what if you enter avalidoption? In that case the option is accepted, we use the switch statement to analyze the value of $result, and then we run the appropriate block of code. Onscreen, that’s going to look something like this: ...
Ok we can fix that if we allow chains whenreturnis the start of the statement but not when we’re in a chain. But now we have two kinds of return statement and pipelines aren’t just degenerate pipeline chains, they have all these caveats. ...