What is REPL?

A Read-Eval-Print Loop (REPL) is an interactive interpreter to a programming language. It allows for simple experimentation with a language by bypassing the compile stage of the "code -> compile -> execute" cycle.

There are 4 components to a REPL:

• A read function, which reads input from the keyboard
• An eval function, which evaluates code passed to it
• A print function, which formats and displays results
• A loop function, which runs the three previous commands until termination