Microsoft® Windows PowerShell™ Step By Step

Understanding Variables and Constants

Understanding the use of variables and constants in Windows PowerShell is fundamental to much of the flexibility of the PowerShell scripting language. Variables are used to hold information for use later in the script. Variables can hold any type of data, including text, numbers, and even objects.

Use of Variables

By default when working with Windows PowerShell, you do not need to declare variables before use. When you use the variable to hold data, it is declared. All variable names must be preceded with a dollar sign ($). There are a number of special variables in Windows PowerShell. These variables are created automatically and have a special meaning. A listing of the special variables and their associated ...