Cmdlets are specialized commands in the PowerShell environment that implement specific functions.
Below four cmdlets are critical to figuring out how to make PowerShell do your work.
Cmdlets - Get-Help
Cmdlets - Get-Command
Cmdlets - Get-Member
Cmdlets - Get-PSDrive
Command to get powershell version
Execute below command to know powershell version
Major Minor Build Revision
----- ----- ----- --------
2 0 -1 -1
Note: You can identify version at the top powershell window.