After iex -S mix you should have seen something like:

** (Mix) "mix" with no arguments must be executed in a directory with a mix.exs file

Usage: mix [task]

Examples:

    mix             - Invokes the default task (mix run) in a project
    mix new PATH    - Creates a new Elixir project at the given path
    mix help        - Lists all available tasks
    mix help TASK   - Prints documentation for a given task

The --help and --version options can be given instead of a task for usage and versioning information.

to indicate that something was amiss.

Inside of iex you can get help with

> h()

or on a command with

> h(r)

I’m not sure there is a strict sequence to the Getting Started topics - while in general each builds on what came before, the more you progress towards the end, the more it becomes a loose discussion of topics.

Welcome to the forum!

I assume you are referring to:

One thing I notice is this:

$ iex -S mix

This implies that the Example module exists within a mix project.

You haven’t mentioned whether you have created the Example module within a mix project.

mix projects aren’t discussed until later in: