I am using Ubuntu 18.04
I run the following command
sudo apt-get install scala
This installs scala 2.11.12
but this is an outdated version. The real version of the programming language is 2.13.0
I googled and googled but everything points to very old and outdated articles.
As the OP noted, running apt-get installs an old version of Scala, and a solution it to use SDKMan instead.
Install SdkMan (https://sdkman.io/)
Use sdkman to install scala