About Elixir

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Elixir is a functional programming language. It is a very practical choice for building distributed applications. It runs on the Erlang VM and is generally considered a nicer language to work with than Erlang. If needed, Elixir code can call any Erlang function.

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iex (interactive mode)

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Run the iex executable / shell command to run Elixir in an interactive mode from your terminal. This is great for learning and experimenting with rapid feedback. It is probably not the best way to test or write an application. It can be helpful to figure out why little pieces of code are not doing what you want, or to come up with a starting point for a little piece of code that needs to do something but you don't know where to start and you know this feedback will be helpful.