Erlang is a programming language with the specific qualities of immutable data and distributed computing.
Install the package.
For further documentation you can read Erlang's docs.
To activate the console, type in the command
Where you can enter commands like so:
Erlang/OTP 22 [erts-10.7.2] [source] [64-bit] [smp:4:4] [ds:4:4:10] [async-threads:1] [hipe] Eshell V10.7.2 (abort with ^G) 1> 1 + 2 . 3 2> (2 + 3) * 4 / 5 . 4.0 3>