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]
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