Elixir Language Introduction
Remarks[edit | edit source]
Elixir is a dynamic, functional language designed for building scalable and maintainable applications.
Elixir leverages the Erlang VM, known for running low-latency, distributed and fault-tolerant systems, while also being successfully used in web development and the embedded software domain.
Versions[edit | edit source]
Hello World[edit | edit source]
For installation instructions on elixir check here, it describes instructions related to different platforms.
Elixir is a programming language that is created using
erlang, and uses erlang's
BEAM runtime (like
JVM for java).
We can use elixir in two modes: interactive shell
iex or directly running using
Place the following in a file named
IO.puts "Hello world!"
From the command line, type the following command to execute the Elixir source file:
$ elixir hello.exs
This should output:
This is known as the scripted mode of
Elixir. In fact, Elixir programs can also be compiled (and generally, they are) into bytecode for the BEAM virtual machine.
You can also use
iex for interactive elixir shell (recommended), run the command you will get a prompt like this:
Interactive Elixir (1.3.4) - press Ctrl+C to exit (type h() ENTER for help) iex(1)>
Here you can try your elixir
hello world examples:
iex(1)> IO.puts "hello, world" hello, world :ok iex(2)>
You can also compile and run your modules through
iex. For example, if you have a
helloworld.ex that contains:
defmodule Hello do def sample do IO.puts "Hello World!" end end
iex(1)> c("helloworld.ex") [Hello] iex(2)> Hello.sample Hello World!
Hello World from IEx[edit | edit source]
You can also use the
IEx (Interactive Elixir) shell to evaluate expressions and execute code.
If you are on Linux or Mac, just type iex on your bash and press enter:
If you are on a Windows machine, type:
Then you will enter into the IEx REPL (Read, Evaluate, Print, Loop), and you can just type something like:
iex(1)> "Hello World" "Hello World"
If you want to load a script while opening an IEx REPL, you can do this:
$ iex script.exs
script.exs is your script. You can now call functions from the script in the console.