Introduction to The Windows PowerShell If -And Statement. One of the best statements for filtering data is the ‘If’ clause. For scripts that require precise flow control you could incorporate PowerShell’s -And, the benefit is that your test could now include multiple conditions.
PowerShell. 2 minutes to read.In this articlePowerShell is a task-based command-line shell and scripting language built on.NET.PowerShell helps system administrators and power-users rapidly automate tasks that manageoperating systems (Linux, macOS, and Windows) and processes.PowerShell commands let you manage computers from the command line. PowerShell providers let youaccess data stores, such as the registry and certificate store, as easily as you access the filesystem. PowerShell includes a rich expression parser and a fully developed scripting language. PowerShell is open-sourcePowerShell base source code is now available in GitHub and open to community contributions.See.You can start with the bits you need at.Or, perhaps, with a quick tour at.
PowerShell design goalsPowerShell is designed to improve the command-line and scripting environment by eliminatinglong-standing problems and adding new features. DiscoverabilityPowerShell makes it easy to discover its features. For example, to find a list of cmdlets that viewand change Windows services, type: Get-Command.-ServiceAfter discovering which cmdlet accomplishes a task, you can learn more about the cmdlet by usingthe Get-Help cmdlet. For example, to display help about the Get-Service cmdlet, type: Get-Help Get-ServiceMost cmdlets return objects that can be manipulated and then rendered as text for display. To fullyunderstand the output of a cmdlet, pipe the output to the Get-Member cmdlet. For example, thefollowing command displays information about the members of the object output by the Get-Servicecmdlet. Get-Service Get-MemberConsistencyManaging systems can be a complex task.
Tools that have a consistent interface help to control theinherent complexity. Unfortunately, command-line tools and scriptable Component Object Model (COM) objects aren't known fortheir consistency.The consistency of PowerShell is one of its primary assets. For example, if you learn how to usethe Sort-Object cmdlet, you can use that knowledge to sort the output of any cmdlet. You don'thave to learn the different sorting routines of each cmdlet.Additionally, cmdlet developers don't have to design sorting features for their cmdlets.
PowerShellprovides a framework with the basic features that forces consistency. The framework eliminates somechoices that are left to the developer.
But, in return, it makes the development of cmdlets muchsimpler. Interactive and scripting environmentsThe Windows Command Prompt provides an interactive shell with access to command-line tools andbasic scripting. Windows Script Host (WSH) has scriptable command-line tools and COM automationobjects, but doesn't provide an interactive shell.PowerShell combines an interactive shell and a scripting environment. PowerShell can accesscommand-line tools, COM objects, and.NET class libraries. This combination of features extends thecapabilities of the interactive user, the script writer, and the system administrator.
Object orientationPowerShell is based on object not text. The output of a command is an object. You can send theoutput object, through the pipeline, to another command as its input.This pipeline provides a familiar interface for people experienced with other shells. PowerShellextends this concept by sending objects rather than text. Easy transition to scriptingPowerShell's command discoverability makes it easy to transition from typing commands interactivelyto creating and running scripts. PowerShell transcripts and history make it easy to copy commandsto a file for use as a script.
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If statement in PowerShellThe following rules apply for if statements in PowerShell:. PowerShell commands are case-insensitive, so you can use If, if, or IF.
The same applies to else. The boolean condition has to be in parentheses. The depending statement must be in braces.In the simplest situation, the condition only contains one variable that has to be tested whether it is defined or unequal to zero. If this is the case, the test of the boolean condition evaluates in TRUE; otherwise, it is FALSE. If you enter 1, 2, or 3, the corresponding message will be displayed; otherwise, you’ll see “Invalid entry.” PowerShell tests all switch casesIf a match occurs, the corresponding instruction will be executed; however, PowerShell will still run through the remaining cases. If another value matches, the corresponding instruction will be executed as well.If you want to avoid this behavior, you have to end the instruction with break. PowerShell will then exit the block whenever a value matches.In the above example, this would look like this.
Marion, It totally agree. The Windows 10 UI is still a mess.
It is ugly and it is often hard to work with it.It has been a while since I wrote this post and I admit that I changed my mind in the meantime. I still believe that mixing two interface types (PC, touch) doesn't make sense.However, after dumping Windows and working on a Mac for couple of years, I now believe that it was a big mistake adding a touch interface to Windows.Apple got it right. A great interface for touch and a great interface for laptops and desktops. No compromises!