Elm is a statically typed, functional programming language created in 2012 by Evan Czaplicki. It has gained popularity in recent years due to its focus on simplicity, ease of use, and developer productivity. Elm programs are composed of modules that export values and functions. Types are inferred automatically, making the language relatively easy to learn. Elm's type system is robust and prevents many common programming mistakes. Elm ships with a REPL (read-eval-print loop) that makes it easy to try out code snippets and get instant feedback. Elm also includes a comprehensive standard library that covers everything from basic string and array operations to more complex tasks like HTTP requests and web scraping. Elm has been used in production for various applications, including a compiler for the Lily programming language, an online chat app, and a music player.