erlang software package provides Concurrent, real-time, distributed functional language, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install erlang
erlang is installed in your system.
Make ensure the erlang package were installed using the commands given below,
$ sudo dpkg-query -l | grep erlang *
You will get with erlang package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Interpreters |
| Package | erlang |
| Version | 1:19.1.5+dfsg-1 |
| Description | Concurrent, real-time, distributed functional language |
| Sub Section | Interpreters |