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List:       haskell-cafe
Subject:    Re: [Haskell-cafe] Converting from Int to Double
From:       Jorge Adriano Aires <jadrian () mat ! uc ! pt>
Date:       2005-01-26 21:09:17
Message-ID: 200501262109.17193.jadrian () mat ! uc ! pt
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> >> How can I convert an Int into a Double?
> >
> > You don't convert to, you convert from :-)
> > The function 'fromIntegral' is probably what you want.
>
> And what function can I use to convert from Double to Int (the inverse of
> fromIntegral) ?

Use the functions in the RealFrac class.
http://www.haskell.org/onlinereport/standard-prelude.html#$tRealFrac

class  (Real a, Fractional a) => RealFrac a  where
     properFraction   :: (Integral b) => a -> (b,a)
     truncate, round  :: (Integral b) => a -> b
     ceiling, floor   :: (Integral b) => a -> b

J.A.


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