From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Emanuel Berg via Users list for the GNU Emacs text editor Newsgroups: gmane.emacs.help Subject: Re: How to read an integer from the minibuffer Date: Tue, 16 Nov 2021 07:21:38 +0100 Message-ID: <87tugc39jh.fsf@zoho.eu> References: <87y25u9pzj.fsf@zoho.eu> <993162c2a13d5ea3b0aa@heytings.org> <87lf1u9pdj.fsf@zoho.eu> <993162c2a1f85349fcfa@heytings.org> <87fss29on7.fsf@zoho.eu> <87v90x5g7p.fsf@zoho.eu> <87mtm95b64.fsf@zoho.eu> Reply-To: Emanuel Berg Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="9016"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:Pd/r6OiY/DOQ+KPkQ6yylP/Ujz4= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Tue Nov 16 07:23:17 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 1mmrsC-00029U-TM for geh-help-gnu-emacs@m.gmane-mx.org; Tue, 16 Nov 2021 07:23:16 +0100 Original-Received: from localhost ([::1]:46854 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mmrsB-0001Yd-Sp for geh-help-gnu-emacs@m.gmane-mx.org; Tue, 16 Nov 2021 01:23:15 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:42846) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mmrqq-0001WH-5P for help-gnu-emacs@gnu.org; Tue, 16 Nov 2021 01:21:52 -0500 Original-Received: from ciao.gmane.io ([116.202.254.214]:48570) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mmrqm-0006zw-Il for help-gnu-emacs@gnu.org; Tue, 16 Nov 2021 01:21:50 -0500 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1mmrqk-0000J6-8r for help-gnu-emacs@gnu.org; Tue, 16 Nov 2021 07:21:46 +0100 X-Injected-Via-Gmane: http://gmane.org/ Mail-Followup-To: help-gnu-emacs@gnu.org Mail-Copies-To: never Received-SPF: pass client-ip=116.202.254.214; envelope-from=geh-help-gnu-emacs@m.gmane-mx.org; helo=ciao.gmane.io 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=0.249, SPF_HELO_NONE=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: 2.1.29 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:134621 Archived-At: Jean Louis wrote: >>> Should I say "actual number"? >> >> It depends: >> >> complex C = ... -3 + 2i, 0, 1 + 3i ... >> composite 4, 6, 8, 9, 10, 12 ... >> integers Z = ... -3, -2, -1, 0, 1, 2, 3 ... >> irrational F = ... \pi, \sqrt{2}, 0.121221222 ... >> natural N = 1, 2, 3, 4 ... >> prime P = 2, 3, 5, 7, 11, 13, 17 ... >> rational Q = -\frac{1}{2}, 0.33333 ... \frac{5}{2}, \frac{11}{10} ... >> real R = ... -3, -1, 0, \frac{1}{5}, 1.1, \sqrt{2}, 2, 3, \pi ... >> whole W = 0, 1, 2, 3, 4 ... >> >> https://davenport.libguides.com/math-skills-overview/basic-operations/sets > > I would just check for those numbers that are accepted by > Emacs Lisp. > > 2i does not evaluate, thus I cannot use that one. You can use complex/imaginary numbers in Elisp, e.g. (calc-eval "1 + 2i + 3") Or (calcFunc-add 3 '(float 5 0) '(cplx 4 5)) ; (cplx (float 12 0) 5) See here for more discussion: https://stackoverflow.com/questions/28629797/complex-imaginary-numbers-in-elisp -- underground experts united https://dataswamp.org/~incal