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Mastering PowerShell Scripting

You're reading from   Mastering PowerShell Scripting Automate repetitive tasks and simplify complex administrative tasks using PowerShell

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Product type Paperback
Published in May 2024
Publisher Packt
ISBN-13 9781805120278
Length 826 pages
Edition 5th Edition
Languages
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Author (1):
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Chris Dent Chris Dent
Author Profile Icon Chris Dent
Chris Dent
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Table of Contents (23) Chapters Close

Preface 1. Introduction to PowerShell 2. Modules FREE CHAPTER 3. Variables, Arrays, and Hashtables 4. Working with Objects in PowerShell 5. Operators 6. Conditional Statements and Loops 7. Working with .NET 8. Files, Folders, and the Registry 9. Windows Management Instrumentation 10. Working with HTML, XML, and JSON 11. Web Requests and Web Services 12. Remoting and Remote Management 13. Asynchronous Processing 14. Graphical User Interfaces 15. Scripts, Functions, and Script Blocks 16. Parameters, Validation, and Dynamic Parameters 17. Classes and Enumerations 18. Testing 19. Error Handling 20. Debugging 21. Other Books You May Enjoy
22. Index

Variable commands

The variable commands may be used to explore and interact with variables defined in PowerShell. However, these commands are rarely used to declare variables when writing scripts or functions.

PowerShell optimizes code when it can, specifically in this section around the use of local variables. Using the *-Variable commands in a script block disables optimization, which will have an impact on the performance of a script.

The following commands are used to work with variables:

  • Get-Variable
  • New-Variable
  • Set-Variable
  • Remove-Variable
  • Clear-Variable

When using the variable commands, the $ preceding the variable name is not considered part of the name; $ tells PowerShell what follows is a variable name.

Get-Variable

The Get-Variable command provides access to any variable that has been created in the current session as well as the default (automatic) variables created by PowerShell. For further information on automatic...

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