The other option is to use values:<div><br></div><div><meta http-equiv="content-type" content="text/html; charset=utf-8"><span class="Apple-style-span" style="border-collapse: collapse; font-family: arial, sans-serif; font-size: 13px; ">(define (p x)<br> (values (+ x 10)<br> (* x 10)))</span></div><div><br></div><div><br></div><div>That will return 2 values.</div><div><br></div><div>However, if you want to actually "display" the answers, you can:</div> <div><br></div><div><meta http-equiv="content-type" content="text/html; charset=utf-8"><span class="Apple-style-span" style="border-collapse: collapse; font-family: arial, sans-serif; font-size: 13px; ">(define (p x)<br> (displayln (+ x 10))<br> (displayln (* x 10)))</span></div><div><br></div><div><br></div><div>[]'s</div><div><br clear="all">Rodolfo Carvalho<br> <br><br><div class="gmail_quote">On Thu, Jun 2, 2011 at 09:52, Hendrik Boom <span dir="ltr"><<a href="mailto:hendrik@topoi.pooq.com">hendrik@topoi.pooq.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"> <div class="im">On Wed, Jun 01, 2011 at 02:57:41PM -0700, Yingjian Ma wrote:<br> > Hi all,<br> ><br> > 1 I wrote<br> ><br> > (define (p x)<br> > (+ x 10)<br> > (* x 10)<br> > )<br> ><br> > The result of (p 4) is 40. How can I display 14 and 40?<br> <br> </div>You could return a list instead of the individual numbers. The way<br> you've coded it, the 14 is computed, then discarded. Then the 40 is<br> computed and returned.<br> <br> In LISP I'd code (list (+ x 10) (* x 10)). I'm not quite sure if 'list'<br> is still called 'list' in Scheme, though; a lot of the built-in function<br> names have changed since the 60's, when I was heavily involved with<br> Lisp. Look it up.<br> <font color="#888888"><br> -- hendrik<br> </font><div><div></div><div class="h5">_________________________________________________<br> For list-related administrative tasks:<br> <a href="http://lists.racket-lang.org/listinfo/users" target="_blank">http://lists.racket-lang.org/listinfo/users</a><br> </div></div></blockquote></div><br></div>