Windows/winver

Get Windows Version (Console)

ver
 # example: Microsoft Windows [Version 10.0.19045.5608]

Get Windows Version (GUI)

winver

Powershell:

[System.Environment]::OSVersion

PS C:\> [System.Environment]::OSVersion

Platform ServicePack Version      VersionString
-------- ----------- -------      -------------
 Win32NT             10.0.19045.0 Microsoft Windows NT 10.0.19045.0