#f and false both work, maybe someone else can comment about if there are limitations related to which language (Beginner, Advanced, full Racket...) is declared in DrRacket. <div class="gmail_quote">On Wed, Jan 5, 2011 at 10:34, Arthur Nunes-Harwitt <<a href="mailto:anh@cs.rit.edu">anh@cs.rit.edu</a>> wrote: <blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">Hi, I apologize if this is not quite the right mailing list. I just started looking at the 2e version and I noticed the following. <blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">(string->number "hello world") </blockquote> #f Shouldn't that read as follows? <blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">(string->number "hello world") </blockquote> false -Arthur ============================================================== Arthur Nunes-Harwitt Computer Science Department, Rochester Institute of Technology Room 70-3509 585-475-4916 ============================================================== "I don't know what the language of the future will be called, but it will look like LISP." This email is confidential and intended for the named recipient(s). In the event the email is received by someone other than the recipient, please notify the sender at <a href="mailto:anh@cs.rit.edu" target="_blank">anh@cs.rit.edu</a>. _________________________________________________ For list-related administrative tasks: <a href="http://lists.racket-lang.org/listinfo/users" target="_blank">http://lists.racket-lang.org/listinfo/users</a> </blockquote> </div>