Re: [Haskell-beginners] having trouble with helloworld style program

Sunil S Nandihalli wrote:

module Main where import Prelude

stringToInt::String->Int stringToInt str = read str

main = do x<-getLine y<-stringToInt x print y

It is a type problem. Using the '<-' syntax for 'stringToInt' requires that it is a monadic function (like: String -> IO Int), but it is not. Since it is not monadic, you can simply let-bind the result to a name: do xStr <- getLine let x = stringToInt xStr print x Or more simply: do xStr <- getLine print (stringToInt xStr) Greets, Ertugrul -- nightmare = unsafePerformIO (getWrongWife >>= sex) http://ertes.de/