Learn ELIXIR with Real Code Examples

Elixir is functional and immutable, running on the battle-tested Erlang VM.

It excels at concurrency, fault tolerance, and massive scalability.

Used for real-time systems, distributed apps, telecom-level reliability, and Phoenix web apps.

Functional programming

Immutable data

BEAM concurrency model

OTP behaviours

Pattern matching

Metaprogramming (macros)

Pattern matching

Immutability

Processes & messaging

Supervision trees

Mix build tool

OTP behaviours (GenServer, Supervisor)

lib/ modules

mix.exs config

config/ environment configs

test/ folder

rel/ releases

Generate project using mix new

Write modules & functions

Add dependencies in mix.exs

Run via iex -S mix

Compile & test

Deploy via releases

Beginner: basic functions

Intermediate: GenServers & processes

Advanced: OTP & supervision

Expert: distributed systems, clustering

More concurrent and fault-tolerant than Node.js

Simpler concurrency model than Go

Better real-time features than Python/Django

More scalable under load than Ruby on Rails

2011 – Elixir initial release

2014 – v1.0 stable release

2015–2025 – Phoenix, LiveView, OTP improvements

BEAM: Erlang VM

OTP: set of libraries for reliability

GenServer: generic server abstraction

Process: lightweight BEAM actor

Supervision tree: fault recovery system