I’ve published a new article in my Elixir learning series on dev.to exploring modules - the labeled containers that group related functions and keep code organized.

The article covers:

• What modules really are and why module names are atoms under the hood
• Defining modules with defmodule and structuring their functions
• Public vs private functions with def and defp - and why private functions matter
• Using module attributes as compile-time constants
• Documenting modules and functions with @moduledoc and @doc
• How module names map to files and directories in a project
• Nested modules, namespacing with dots, Module.split/1, Module.concat/1, and MODULE
• Building a small in-memory to-do list module from scratch to tie it all together

With complete working examples you can copy into IEx, you’ll learn how modules become the backbone of organizing any Elixir codebase - from small scripts to large applications.
Check it out: