Haskell is pure FunctionalProgramming? language that employs LazyEvaluation and supports generic or PolymorphicTypes.

It has some cool concepts like the dot operator. If you remember your calculus, it used the . for functional composition: so does Haskell! This allows you to do something similar to the pipe operator used in shell scripting.

Example

-- sieve: prints the number of prime numbers between 2 and 100000

sieve :: [Int? -> [Int? sieve [? = [? sieve (h:t) = h : sieve [x?

main = (putStrLn . show . length . sieve) [2..100000?

Implementations

[HUGS | http

//haskell.org/hugs] : Haskell Users' Gofer1? System. An interpreter that's good for playing around learning Haskell (which is what you do with Haskell, unless you're serious computer scientist).

[GHC | http

//www.haskell.org/ghc/] : Glasglow Haskell Compiler. A big, optimising compiler for Haskell.

1? Gofer was a subset of Haskell, HUGS now implements full Haskell.

CategoryProgrammingLanguages, CategoryFunctionalProgrammingLanguages