What is Haskell? Nedir?

Haskell was born in 1990 from the academic community's effort to create a common standard language for functional programming. Named after mathematician and logician Haskell Curry, the language is built on lazy evaluation and pure functions. Haskell's most distinctive feature is its purity. Side-effecting operations are explicitly marked through the type system (IO monad). This approach increases the verifiability of code through reasoning. Lazy evaluation ensures expressions are computed only when their results are needed. Haskell's type system is considered among the most powerful in programming languages, featuring Hindley-Milner type inference, type classes, algebraic data types (ADT), generalized algebraic data types (GADT), and dependent type-like features. Category theory concepts such as monads, functors, and applicatives are first-class citizens. Haskell is used in academic research, compiler design, the finance sector, and blockchain technologies. The Cardano blockchain is written in Haskell. Facebook's spam filter Sigma system is Haskell-based.

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