On Sat, Jan 30, 2010 at 8:39 AM, zaxis <z_axis at 163.com> wrote: > fac n = foldr (*) 1 [1..n] > fac n = product [1..n] ;) -------------- next part -------------- An HTML attachment was scrubbed... URL: http://www.haskell.org/pipermail/haskell-cafe/attachments/20100130/b31e3ca4/attachment.html