Most modern programming languages come with a REPL (Read Evaluate Print Loop)tool to allow you to interact with the language experientially. Ruby has IRB, JavaScript has Node.js' tool, Swift has both a REPL and a Playground, and, of course, Elixir has IEx. If you’ve not taken advantage of IEx or other similar tool, you owe it to yourself to give it a try. Once you get used to the convenience of a
