Name: Anonymous 2009-02-27 13:02
GHCi, version 6.8.2: http://www.haskell.org/ghc/ :ihbt for help
Loading package base ... linking ... done.
Prelude> let fact n = product [1..n]
Prelude> fact 5
120
Prelude> let doubleFact = fact.fact
Prelude> doubleFact 3
720
Prelude>