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 Pascal case. For example:
$myVariableis camel case$MyVariableis Pascal case
PowerShell does not enforce a naming convention, nor does it consistently use a convention in the automatic variables.
One of the most commonly accepted practices is that variables used as parameters must use Pascal case. Variables used only within a script or a function must use camel case.
I suggest making your variable names meaningful so that when you revisit your script after a long break, you can identify its purpose. I recommend choosing and maintaining a consistent style in your own code...