On Tue, 2007-10-09 at 13:07 -0700, Don Stewart wrote: > jonathanccast: > > I just noticed that pi doesn't have a default definition in the standard > > prelude, according to the Haddock docs. Why is this? > > $ ghci > Prelude> :t pi > pi :: (Floating a) => a > > Prelude> pi > 3.141592653589793 > > It's in the Floating class.
Yes. But it doesn't have a default implementation. That strikes me as odd, considering the mathematical and actual correctness of class Floating sigma where pi = acos (-1) ... jcc _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
