Haskell

An advanced, purely functional programming language.

When to Use

• Pure Functional Programming: Building systems with mathematical guarantees of purity, referential transparency, and immutability.
• Compiler Construction & Domain-Specific Languages (DSLs): Authoring parsers, programming language compilers, and type checkers.
• Financial Modeling & Cryptographic Protocols: Implementing smart contract runtimes (Cardano/Plutus) and quantitative financial models.
• High-Assurance Systems: Mission-critical software where compile-time type verification must eliminate runtime errors entirely.

Quick Start

main :: IO ()
main = putStrLn "Hello, World!"