But this brings up a strange thing in GHCi. Suppose I load the following module into GHCi:

\begin{code} module Foo where

kalle = (fromRational ((toRational 4) - ( toRational 5.2 )))

default (Rational) \end{code}

What happens is the following:

Prelude> :l Foo.hs Compiling Foo ( Foo.hs, interpreted ) Ok, modules loaded: Foo. *Foo> kalle (-6) % 5 *Foo> (fromRational ((toRational 4) - ( toRational 5.2 ))) -1.2000000000000002

It seems like GHCi doesn't care about the default directive on the promt.

This is a known bug: http://sourceforge.net/tracker/index.php?func=detail&aid=431362&group_id =8032&atid=108032 Cheers, Simon