GHCi

GHCi is the interactive environment and interpreter for the Glasgow Haskell Compiler (GHC), allowing developers to write, test, and debug Haskell code in real-time. It provides a REPL (Read-Eval-Print Loop) interface for evaluating expressions, loading modules, and inspecting types, making it an essential tool for Haskell development and learning.

Also known as: GHC Interactive, Haskell REPL, GHC interpreter, Haskell interactive shell, GHCi shell

Why learn GHCi?

Developers should use GHCi when working with Haskell for rapid prototyping, debugging, and exploring language features without the overhead of compiling full programs. It is particularly useful for functional programming tasks, algorithm testing, and educational purposes where immediate feedback is valuable.

Learning Resources

• docs: GHC User's Guide - GHCi
• tutorial: Learn You a Haskell for Great Good! - Starting Out
• book: Haskell Programming from First Principles - Using GHCi
• video: GHCi Tutorial on YouTube