In ghci you want to make a multi-line expression: :{ let digs 0 =[0] digs x = (digs (x `div` 10)) ++ [(x `rem` 10)] :} (Note we don't put "let" on the second line) tom > El 13 nov 2015, a las 01:47, akash g <akaberto at gmail.com> escribió: > > let digs 0 =[0] > let digs x = (digs (x `div` 10)) ++ [(x `rem` 10)]