[Haskell-beginners] defining functions in ghci

[Joe Van Dyk]

This messes me up:

$ ghci
GHCi, version 6.8.2: http://www.haskell.org/ghc/  :? for help
double x =Loading package base ... linking ... done.
Prelude> double x = x + x
<interactive>:1:9: parse error on input `='


Why does that happen?

-- 
Joe Van Dyk
http://fixieconsulting.com