IO.puts("Hello, world!")

Run the script:

elixir main.exs

This prints a line in Elixir using the IO module. It is the normal first example for a script.

Values are immutable. Rebinding creates a new binding for the name.

name = "Dan"
count = 1
active = true

These bindings hold values for the current expression flow. In Elixir, you work with new bindings instead of mutating old values.

{:ok, name} = {:ok, "Dan"}
[first | rest] = [1, 2, 3]

This pulls values out of a tuple and a list by matching the shape on the left to the data on the right.

defmodule Greeter do
  def greet(name) do
    "Hello, #{name}!"
  end
end

Greeter.greet("world")

This defines a small module with one function and then calls it. That is the standard way to group behavior in Elixir.