14 May
2007
14 May
'07
1:05 p.m.
Nick Meyer wrote:
main = do putStrLn "Enter a number: " inp <- getLine let n = read inp if n == 0 then putStrLn "Zero" else putStrLn "NotZero"
(that's with all the expressions in the do block lining up vertically, if that doesn't show up in a fixed-width font), it works! I would think that your original indentation gave an error in that GHC would see "then" and "else" and assume they were new expressions, but then I would expect that this would have the same problem. If anyone can shed some light on this, that would be nice.
http://hackage.haskell.org/trac/haskell-prime/wiki/DoAndIfThenElse says "already implemented in GHC and Hugs". Zun.