<br><br><div class="gmail_quote">On Sat, Jan 30, 2010 at 8:39 AM, zaxis <span dir="ltr"><<a href="mailto:z_axis@163.com">z_axis@163.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
fac n = foldr (*) 1 [1..n]<br></blockquote><div><br>fac n = product [1..n]<br><br>;)<br><br></div></div>