[Haskell-beginners] Re: exercise 3.10 in YAHT

loading the file that contains the above function into GHCi (version 6.8.3) gives the following error "The last statement in a 'do' construct must be an expression"

being a beginner, I'm at a loss at the cause of the error and how to fix it -- any suggestions?

thanks, george

No problem here too, ghc 6.8.2. Maybe seeing how things are when layout style is not used helps you see a possible layout problem. Maybe it doesn't, and you can just forget the example below :) module Main (main) where { getNums = putStrLn "Enter a number (zero to stop):" >> do { num <- readLn ; if num == 0 then return [] else do {rest <- getNums ; return (num:rest)} } ; main = getNums >>= putStrLn . show } Best, Maurício