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About ERL Files

An .erl file is a source code file that contains program instructions written in the Erlang programming language. ERL files typically contain functions, modules, and other code used to process information, communicate between systems, and perform tasks within an Erlang application.

Ericsson developed Erlang in the 1980s to build reliable systems that could handle many simultaneous connections and keep operating with minimal interruption. It has been used extensively in telecommunications and later in messaging, networking, distributed systems, and other applications that require high availability. You may find .erl files when developing or maintaining Erlang software, working with distributed applications, studying functional programming, or examining source code for systems built with Erlang and the BEAM virtual machine.

You can open and view the contents of an .erl file with a source code editor or plain text editor. To compile and run the code in the .erl file, you generally need the Erlang/OTP development environment or another compatible Erlang compiler.