As I mentioned before, the switch statement is beefed up in PowerShell because it can be used in different ways to accomplish different things, as opposed to the kind of “dry style” of the if/else block. Let’s take a look at a few examples to see it in action: Using the default...
If / else conditions are the most useful conditions in a scripting language and you may want to use multiple times while writing script. If the first condition in If the statement fails then the second stage is ElseIf statement. InElseIfblock you can also specify your conditions or test val...
These were just two basic examples of how conditional statements work in PowerShell. Let’s move on to the Else statement. How to use the PowerShell Else statement with the If statement In PowerShell, you can use the Else statement with the If statement to create conditional logic. It allo...
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...
function Get-Power([int]$x, [int]$y) { if ($y -gt 0) { return $x * (Get-Power $x (--$y)) } else { return 1 } } Examples:PowerShell 複製 New-Object 'int[,]' 3,2 New-Object -ArgumentList 3,2 -TypeName 'int[,]' dir e:\PowerShell\Scripts\*statement*.ps1 | Forea...
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. ...
else statement Executes the script block that follows it if none of the conditions in the if or elseif statements before it evaluate to true In addition to being useful for script control flow, conditional statements are often a useful way to assign data to a variable. PowerShell makes this...
PowerShell 7.0 introduces a ternary operator which behaves like a simplifiedif-elsestatement. PowerShell's ternary operator is closely modeled from the C# ternary operator syntax: <condition> ? <if-true> : <if-false> The condition-expression is always evaluated and its result converted to aBoole...
If we had a System.IO.PathTooLongException, the IOException would match but if we had an InsufficientMemoryException then nothing would catch it and it would propagate up the stack. Catch multiple types at once It's possible to catch multiple exception types with the same catch statement. ...
PowerShell executes the begin statement when it loads your script, the process statement for each item passed down the pipeline, and the end statement after all pipeline input has been processed. 3. 采用main函数的script语句 function Main