The software version of the console software is a six digit number, separated by decimal points. For example, the below screenshots show version 18.104.22.168.0.3. This can also be abbreviated as 1.9.6, Build 3.
The version number of the console can be found in two places.
While there is version information present in the shell under Settings -> General, this information reflects other pieces of software that do not always change with updated software. The above two methods are the best ways of confirming your software version.
For information on updating your console, please see the following article: <<Updating Eos Family Software>>