From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Jean Louis Newsgroups: gmane.emacs.help Subject: What is 0.01 here not 0.01 here 0.009999999999999? Date: Fri, 02 Apr 2021 16:42:42 +0300 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="14984"; mail-complaints-to="usenet@ciao.gmane.io" To: Help GNU Emacs Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Fri Apr 02 15:43:51 2021 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lSK5X-0003pM-Ot for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 02 Apr 2021 15:43:51 +0200 Original-Received: from localhost ([::1]:52456 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lSK5W-000636-Pc for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 02 Apr 2021 09:43:50 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:51838) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lSK4d-0005Z0-5Y for help-gnu-emacs@gnu.org; Fri, 02 Apr 2021 09:42:55 -0400 Original-Received: from stw1.rcdrun.com ([217.170.207.13]:60979) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lSK4a-0004Qx-V9 for help-gnu-emacs@gnu.org; Fri, 02 Apr 2021 09:42:54 -0400 Original-Received: from localhost ([::ffff:41.202.241.38]) (AUTH: PLAIN securesender, TLS: TLS1.3,256bits,ECDHE_RSA_AES_256_GCM_SHA384) by stw1.rcdrun.com with ESMTPSA id 0000000000027F39.0000000060671F5A.00003B9F; Fri, 02 Apr 2021 06:42:49 -0700 Received-SPF: pass client-ip=217.170.207.13; envelope-from=support1@rcdrun.com; helo=stw1.rcdrun.com X-Spam_score_int: -16 X-Spam_score: -1.7 X-Spam_bar: - X-Spam_report: (-1.7 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.25, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.io gmane.emacs.help:128808 Archived-At: I would like to get a number increased for 0.01: (defun rcd-vc-increase-decimal-revision-number (nn.nn) (let* ((nn.nn (format "%s" nn.nn)) (nn.nn (format "%.2f" (string-to-number nn.nn))) (nn.nn (string-to-number nn.nn))) (+ nn.nn 0.01))) But result is not what I want, as I want to get 10.13, though it is tiny loss: (rcd-vc-increase-decimal-revision-number "10.12") → 10.129999999999999 I found how to solve it, but maybe there is better way to round the decimals behind the dot? (defun rcd-vc-increase-decimal-revision-number (nn.nn) (let* ((nn.nn (format "%s" nn.nn)) (nn.nn (format "%.2f" (string-to-number nn.nn))) (nn.nn (string-to-number nn.nn))) (string-to-number (format "%.2f" (+ nn.nn 0.01))))) (rcd-vc-increase-decimal-revision-number "10.12") → 10.13 Jean Take action in Free Software Foundation campaigns: https://www.fsf.org/campaigns Sign an open letter in support of Richard M. Stallman https://rms-support-letter.github.io/