Example of how to use the Random monad in Haskell

random_monad_example.hs

-- cabal install MonadRandom
-- ghc random_monad_example
-- ./random_monad_example

-- The code here is stolen from a comment in the MonadRandom source code.

import Control.Monad.Random

die :: RandomGen g => Rand g Int
die = getRandomR (1,6)

dice :: RandomGen g => Int -> Rand g [Int]
dice n = sequence (replicate n die)

main = do
    rolls <- evalRandIO $ dice 10
    print rolls