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Elixir Hello World! 

Elixir Hello World! 



Click on RUN button to see the output

Elixir Online Compiler

Write, Run & Share Elixir code online using OneCompiler's Elixir online compiler for free. It's one of the robust, feature-rich online compilers for Elixir language, running on the latest version 1.9.4. Getting started with the OneCompiler's Elixir compiler is simple and pretty fast. The editor shows sample boilerplate code when you choose language as Elixir. OneCompiler also has reference programs, where you can look for the sample programs and start learning. Happy learning!!

About Elixir

Elixir is a general purpose programming language built on top of Erlang or Ericsson language. It is very efficient for building distributed, fault tolerant appications. It's been used by many companies like Pinterest, PagerDuty, FarmBot, E-Metro Tel etc.

  • Built especially for scalable and maintanable applications.
  • Everything is an expression
  • Compiles to bytecode
  • Built-in tooling for compilation, testing, debugging, formatting code etc.
  • Erlang functions can be called directly as it get compiled to Erlang bytecode.

Syntax help


Variables must be declared and assigned a value.

variable-name = value

Data types

Data typeUsageDescription
Numericx = 21Elixir supports not only integer and float values but also a number can be defined in octal, hexadecimal and binary bases.
Atom:trueAtoms are constant values whose name is same as their value
Boolean: false, :trueEither true or false, usually declared as atoms
Strings"Hello"Strings are enclosed in double quotes(" ") and multi line strings are enclosed in triple double quotes(""" """)
Lists'a', 10, :trueLists are used to store different types of values and are represented in square brackets []
Tuples{'apple', 100, :false}Similar to Lists and are represented in curly brackets {}. Tuples are good for accessing the values and lists are good for insertion and deletion of values


1. If:

When ever you want to perform a set of operations based on a condition If is used.

if condition do

2. If-Else:

When there is requirement to add code for false condition to IF block.

if condition do

3. Unless:

Unless is similar to If but the code get executed only if the condition fails.

unless condition do

4. Unless-Else:

Unless-Else is similar to If-Else but the code get executed only if the condition fails.

unless condition do
   #Code if condition fails
    #Code if condition satisfies

5. Cond:

Cond is used when you want to execute a piece of code based on multiple conditions.

cond do
   condition-1 -> #code if condition is true
   condition-2 -> #code if condition is true
   true -> #code if none of the above are true

6. Case:

Case is similar to switch in C language.

case value do
    value-1 -> #code if value matches value-1
	value-2 -> #code if value matches value-2
	value-3 -> #code if value matches value-3
	_ -> #code if value does not match any of the above and is similar to default in switch


Function is a sub-routine which contains set of statements. Usually functions are written when multiple calls are required to same set of statements which increases re-usuability and modularity.

Two types of functions are present in Elixir

  1. Anonymous Functions:

Anonymous functions are functions with no name and they use fn..end constructs.

  1. Named functions:

Assign names to functions so that they can be called easily. Always named functions are defined in modules.

defmodule modulename do
    def function_name(parameter1, parameter2) do

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Reference Programs:


No tags available for Elixir

How to use?

Choose the language in which you want to run your program, by clicking the button next to Run. And then write your code in the code box, You can use the auto complete snippets and warnings and errors which helps you to write better code faster way.
Once you are done writing your code click the Run button, now the code will be submitted to OneCompiler and you will see the results in a second.

How to contribute?

Please fork OneCompiler repository and contribute us by adding more languages or the features to the existing OneCompiler backend.
You can also contibute to the community by adding more programs which users can search and use as base code for their programs.

API & More

You can embed OneCompiler into your own website. That helps your website users to write and test their programs within your website.
If you want to run and see the results from your backend you can utilize the OneCompiler API by integrating it with your backend.