[Haskell-beginners] having trouble with helloworld style program

[Ertugrul Soeylemez]

Sukumaran A <sukumaaar at gmail.com> wrote:

> Ohh, I missed to see reply from others. Anyway I am putting one more
> method just from my side
>
> module Main where
> import Prelude
>
> stringToInt::String->Int
> stringToInt str = read str
>
> main =do
>    x<-getLine
>    y<-return x
>    print $ stringToInt y

This is exactly equivalent to the other methods, but has the additional
'return', which is a no-op.  Please do not suggest such a style.  To be
honest, I think the best coding style for this particular example is not
to use do-notation at all:

    module Main where

    main :: IO ()
    main =
        let stringToInt :: String -> Int
            stringToInt = read
        in fmap stringToInt getLine >>=
           print


Greets,
Ertugrul


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