From: waterloo <waterloo2005@gmail.com>
To: Glenn Morris <rgm@gnu.org>
Cc: 3752@emacsbugs.donarmstrong.com
Subject: bug#3752: 23.0.95; I can not understant a sentence in Intro to Emacs Lisp .
Date: Sun, 5 Jul 2009 10:47:06 +0800 [thread overview]
Message-ID: <907065090907041947k6884775fk55f332c776e6858f@mail.gmail.com> (raw)
In-Reply-To: <19024.4165.105934.813448@fencepost.gnu.org>
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when test of while is nil , it does not run `print' following it.
who does print nil ?
or if all function will print its return value ?
thanks
2009/7/5 Glenn Morris <rgm@gnu.org>
>
> [Please use "reply to all".]
>
> waterloo wrote (on Sun, 5 Jul 2009 at 10:13 +0800):
>
> > yes,it is clearer . thanks
> >
> > In 11.1.2 An Example:`print-elements-of-list', I can not understand why
> > there is a `nil' in the context .
>
> This is explained at the end of the section:
>
> Since the last expression in the function is the `while' loop, and
> since `while' loops always return `nil', a `nil' is printed after the
> last element of the list.
>
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next prev parent reply other threads:[~2009-07-05 2:47 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-04 13:00 bug#3752: 23.0.95; I can not understant a sentence in Intro to Emacs Lisp waterloo
2009-07-04 23:11 ` Glenn Morris
2009-07-05 2:13 ` waterloo
2009-07-05 2:30 ` Glenn Morris
2009-07-05 2:47 ` waterloo [this message]
2009-07-06 0:58 ` Glenn Morris
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