Introduction

Developed at Ericsson, Erlang is one of the oldest general purpose language still used in prodction system. This post is just notes about setting up a development environment for erlang projects.

Sample code here

Install Erlang

Windows

Download exe and install :https://www.erlang.org/downloads

Ubuntu

sudo apt-get install erlang

Install rebar3

https://github.com/erlang/rebar3

run bootstrap script (post installing erlang). Make sure erl and rebar3 are in path

Install VS code plugin for erlang

https://marketplace.visualstudio.com/items?itemName=pgourlain.erlang

Create first script project

rebar3 new escript <project-name>

First Code

In main file of created project (usually src\erapp.erl) ) add following line in main function

io:fwrite("hello, world\n"),

Build

rebar3 escriptize

Run

_build/default/bin/erapp

Running Single File

• Write Code
• Open Shell
• Go To code dir
• Start Erlang shell : erl
• Compile code : c(modulename).
• Run code : modulename:func().
• Exit : halt().

Running Single FIle (no shell)

erlc filename.erl
erl -noshell -s modulename func