From: Glenn Morris <rgm@gnu.org>
To: waterloo <waterloo2005@gmail.com>
Cc: 3752@emacsbugs.donarmstrong.com
Subject: bug#3752: 23.0.95; I can not understant a sentence in Intro to Emacs Lisp .
Date: Sun, 05 Jul 2009 20:58:11 -0400 [thread overview]
Message-ID: <77eisu6318.fsf@fencepost.gnu.org> (raw)
In-Reply-To: <907065090907041947k6884775fk55f332c776e6858f@mail.gmail.com> (waterloo's message of "Sun, 5 Jul 2009 10:47:06 +0800")
waterloo wrote:
> 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 ?
As explained in the earlier section of the manual (on "Evaluation"),
evaluating a function with C-x C-e prints the return value. For example
(+ 2 2)
or
(progn
(princ "Evaluating with C-x C-e prints the return value.\n")
42)
prev parent reply other threads:[~2009-07-06 0:58 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
2009-07-06 0:58 ` Glenn Morris [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=77eisu6318.fsf@fencepost.gnu.org \
--to=rgm@gnu.org \
--cc=3752@emacsbugs.donarmstrong.com \
--cc=waterloo2005@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this external index
https://git.savannah.gnu.org/cgit/emacs.git
https://git.savannah.gnu.org/cgit/emacs/org-mode.git
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.