Naming and creating variables

Variables in PowerShell are preceded by the dollar symbol ($), for example:

$MyVariable

The name of a variable may contain numbers, letters, and underscores. For example, each of the following is a valid name:

$123 
$x 
$my_variable 
$variable 
$varIABle 
$Path_To_File

Variables are frequently written in either camel case or upper-camel case (also known as pascal case). PowerShell does not enforce any naming convention, nor does it exhibit a convention in any of the automatic variables. For example:

• $myVariable is camel case
• $MyVariable is upper-camel case or pascal case

I suggest making your variable names meaningful so that when you come and visit your script again after a long break, you can identify its purpose. I recommend choosing and maintaining a consistent style in your own code.

It is possible to use more complex variable names using the following notation:

${My Variable} 
${My-Variable}

The following notation, where a file path is written as the variable name...