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Mastering Windows PowerShell Scripting

You're reading from   Mastering Windows PowerShell Scripting Master the art of automating and managing your Windows environment using PowerShell

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Product type Paperback
Published in Apr 2015
Publisher
ISBN-13 9781782173557
Length 282 pages
Edition 1st Edition
Languages
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Author (1):
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Brenton J.W. Blawat Brenton J.W. Blawat
Author Profile Icon Brenton J.W. Blawat
Brenton J.W. Blawat
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Toc

Table of Contents (16) Chapters Close

Preface 1. Variables, Arrays, and Hashes FREE CHAPTER 2. Data Parsing and Manipulation 3. Comparison Operators 4. Functions, Switches, and Loops Structures 5. Regular Expressions 6. Error and Exception Handling and Testing Code 7. Session-based Remote Management 8. Managing Files, Folders, and Registry Items 9. File, Folder, and Registry Attributes, ACLs, and Properties 10. Windows Management Instrumentation 11. XML Manipulation 12. Managing Microsoft Systems with PowerShell 13. Automation of the Environment 14. Script Creation Best Practices and Conclusion Index

Equal and not equal comparison

The most basic and most used comparison operator is equal to (-eq). This operator is flexible in nature as it can be used for strings, integers, and objects. The -eq operator is used by calling value1 is equal to value2. When the –eq operator evaluates the statement, it will return a Boolean value of either True or False. If the expression evaluates to be True, PowerShell will continue to proceed to execute the code.

A script that shows how to use equal comparison operators would look like this:

$value1 = "PowerShell"
$value2 = "PowerShell"
if ($value1 –eq $value2) { Write-Host "It's Equal!" }

The output of this is shown in the following screenshot:

Equal and not equal comparison

From the preceding example, you will see that the equal comparison operator determines that $value1 is equal to $value2 and it writes to the screen It's Equal!. In the instance that you want to determine whether two values are not equal, you can use the –...

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