The basic alternative is the PowerShell console, which provides a command-line for the user to input their commands. Beginners are advised to stick with the latter until they learn the fundamentals of PowerShell. For many users, PowerShell is a better alternative to Command Prompt. One of the biggest differences is that PowerShell uses cmdlets rather than commands.

To do so, you must use the SupportsShouldProcess keyword in between the [CmdletBinding()] parentheses first as shown below. At this point, you should know that using the WhatIf parameter with a cmdlet or advanced function only simulates the operation. Like all cmdlets, the New-Item cmdlet has a WhatIf parameter.

what if powershell

WhatIf in PowerShell is a part of the ShouldProcess cmdlet functions in PowerShell. ShouldProcess can also prompt for confirmation and is basically a function that decides if it should process Subset sum problem Wikipedia or not process code. Let’s say this function is part of a large script you’ve created to clean up old user accounts. One day you’re tired and accidentally forget a single keystroke.

So if the student’s name is Ranja Display “Name of the student is Ranjan”. However, explaining such a process is outside of this article’s scope. The output will be a list of workspaces, their names with IDs, and other information.

The if…elseif…else Statement

In this example, we are calling the Test-Path cmdlet to see if a file exists or not. If the file exists, we use the Get-Content and Measure-Object cmdlets to return a word count of the file. If the file does not exist, then the script will just end. As you can see from the screenshot, 5 Types of Enterprise Software and Why Theyre Worth the Investment my MacGyver biography is only 13 words long so far. Now that we have a basic understanding of If statements, let’s dive a little deeper and go over the syntax and some more advanced examples. The -WhatIf parameter is a switch parameter and is found in many PowerShell cmdlets.

  • Make sure you start out with the command line interface before graduating to the full-blown GUI.
  • If statements mimic the decision-making process people use every day.
  • This provides you with comprehensive oversight of all active processes.
  • In this example, we created a variable called $eggs and gave it a value of 10.

All compiled PowerShell cmdlets include a parameter called WhatIf. This parameter helps you evaluate if a command will work as you expect or if it will start a nuclear meltdown. Make sure your ad blocker is disabled.Wouldn’t it be nice to know what that PowerShell command would do before it makes changes to your environment? Imagine being able to ask of your command, “What would you do if you were to run? In this example, we are checking the student study graph, which means we are checking if the student is studying properly or not. Let’s work with string operation, suppose we have one student and based on the match we wanted to display the message about student name.

If Else in PowerShell

This write-up explained all the basics of if and else conditions in PowerShell using some suitable examples. One of the most important commands isGet-Service, which provides the user with a list of all services installed on the system, both running and stopped. This cmdlet can be directed by using specific service names or objects. Much like Command Prompt, on PowerShell the cd command still changes directories, and dir still provides a list of files within the selected folder. As such, it’s important to remember you aren’t necessarily starting from scratch. Taking this on board will help to decrease the learning curve you face when using PowerShell and decrease the number of new commands that you have to learn.

It is important to note that Microsoft restricts users from using custom PowerShell cmdlets in its default settings. In order to use PowerShell cmdlets, you need to change the ExecutionPolicyfrom Restrictedto RemoteSigned. Remote Signed will allow you to run your own scripts but will stop unsigned scripts from other users. Some 3rd party functions look like they support WhatIf but it is not implemented! This is because the authors of the cmdlets either have added SupportsShouldProcess at the top of the function or added WhatIf as a switch parameter. PowerShell has built-in functionality for all of its cmdlets and advanced functions, known as the WhatIf parameter.

One of the best ways to do this is by using the ConvertTo-HTML command. This cmdlet allows you to build reports with tables and color, which can help to visualize complex data. This command should be at the very top of any new user’s list when it comes to PowerShell.

what if powershell

Next, we set a conditional statement that says if $eggs is less than 12, display a message. Since $eggs has a value of 10, the message “You have less than a dozen eggs” is displayed. If statements are conditional logic statements that you can add to your PowerShell scripts. If statements mimic the decision-making process people use every day. For example, if it’s raining outside, I’ll grab an umbrella before heading outside. For example, you decided to delete some user accounts in the Active Directory domain according to certain criteria using the PowerShell script.

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Here are the possible values for both $ConfirmPreference and ConfirmImpact. The next option is to specify three parameters to fully customize the message. When three parameters are used, the first one is the entire message. The second two parameters are Best Cloud Security Companies  List of Top 10 Cloud Security Providers still used in the -Confirm message output. Specifying a second parameter as the operation will use the operation value instead of the function name in the message. There is some danger here trusting everything you call will inherit -WhatIf values.

If you need more extensive capabilities through programming to the Power BI objects, then REST API can be a better option. In the below example we are checking if 5 is equal to 5 or not, so it is equal so it will print the message ‘Number is 5’. Since I ran this command on a Thursday, the returned dinner plan was “Tilapia Thursday.” While this script runs as planned and returns the correct results, I need to add a caveat.

what if powershell

Otherwise, you can still use your non-admin Power BI account to use some of the commands. Or, if you prefer to use the list of modules in the PowerShell ISE, Refresh the modules list, then select Power BI Profile module, and select the Cmdlet under that. You can either Run the command from here or insert it, which will insert in the command line.

In this example, you will use the New-Item cmdlet to create a file named newfile1.txt in the same working directory. The above snippet verified that the else-statement was executed because the specified condition was false. He is the leader of the New Zealand Business Intelligence users group.

What is if-statement in PowerShell?

One important feature that is often overlooked is -WhatIf and -Confirm support and it is easy to add to your functions. In this article, we will dive deep into how to implement this feature. If the boolean expression evaluates to true, then the if block of code will be executed, otherwise else block of code will be executed. The test that was added in this version of the function will write to a test file and remove it to validate that you have the permission to write to the directory. First, we must add SupportsShouldProcess inside of CmdletBinding() at the top.

Worse, even a fully debugged script can contain some nasty surprises lurking to ruin the administrator’s weekend plan. Instead, you just seeing output message to the PowerShell console letting you know what services the Stop-Service cmdlet would have stopped. There are many different ways you can take advantage of the WhatIf parameter.

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