example_program.ex

defmodule ModuleName do
  # TODO: Change the name of the module to FirstExercise

  def add_two_numbers(x, y) do
    x + y
  end

  # TODO: Write a function adding a three numbers under here:

  # TODO: make the "hello_world" function the first one in the module (Just move it above all other functions)
  def hello_world() do
    # This prints the text "Hello world" in the console.
    IO.puts("Hello world")
  end

  # TODO: create a function 'console_print', that prints the text "First console output!".

  # TODO: concatenate the string "!" (literally exclamation mark) at the end of the greeting
  def greeting(name) do
    "Hello, " <> name
  end

  # TODO: write the function definition of the function below
  def power_of_two(number) do
    # Write the function definition here. Examples: 'power_of_two(3)' should return '9', 'power_of_two(4)' should return '16'
  end

  # TODO: remove each "TODO", after it is done
end