Book Image

Mastering Windows PowerShell Scripting (Second Edition) - Second Edition

By : Brenton J.W. Blawat
Book Image

Mastering Windows PowerShell Scripting (Second Edition) - Second Edition

By: Brenton J.W. Blawat

Overview of this book

PowerShell scripts offer a handy way to automate various chores. Working with these scripts effectively can be a difficult task. This comprehensive guide starts from scratch and covers advanced-level topics to make you a PowerShell expert. The first module, PowerShell Fundamentals, begins with new features, installing PowerShell on Linux, working with parameters and objects, and also how you can work with .NET classes from within PowerShell. In the next module, you’ll see how to efficiently manage large amounts of data and interact with other services using PowerShell. You’ll be able to make the most of PowerShell’s powerful automation feature, where you will have different methods to parse and manipulate data, regular expressions, and WMI. After automation, you will enter the Extending PowerShell module, which covers topics such as asynchronous processing and, creating modules. The final step is to secure your PowerShell, so you will land in the last module, Securing and Debugging PowerShell, which covers PowerShell execution policies, error handling techniques, and testing. By the end of the book, you will be an expert in using the PowerShell language.
Table of Contents (24 chapters)
Title Page
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Assignment operators


Assignment operators are used to give values to variables. The assignment operators available are the following:

  • Assign: =
  • Add and assign: +=
  • Subtract and assign: -=
  • Multiply and assign: *=
  • Divide and assign: /=
  • Modulus and assign: %=

As with the arithmetic operators, add and assign may be used with strings, arrays, and hashtables. Multiply and assign may be used with strings and arrays.

Assign, add and assign, and subtract and assign

The assignment operator (=) is used to assign values to variables and properties, for example, assignment to a variable:

$variable = 'some value' 

Or we might change the PowerShell window title by assigning a new value to its property:

$host.UI.RawUI.WindowTitle = 'PowerShell window' 

The add and assign operator (+=) operates in a similar manner to the addition operator. The following example assigns the value 1 to a variable, then += is used to add 20 to that value:

$i = 1 
$i += 20

The preceding example is equivalent to writing the following:

$i = 1...