Path: csiph.com!usenet.pasdenom.info!gegeweb.org!usenet-fr.net!nerim.net!novso.com!newsfeed.xs4all.nl!newsfeed1.news.xs4all.nl!xs4all!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.003 X-Spam-Evidence: '*H*': 0.99; '*S*': 0.00; 'from:addr:yahoo.co.uk': 0.04; 'lawrence': 0.09; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'subject:Function': 0.09; 'subject:Help': 0.11; 'def': 0.12; 'language.': 0.14; 'cause.': 0.16; 'courses:': 0.16; 'inputs': 0.16; 'received:80.91.229.3': 0.16; 'received:plane.gmane.org': 0.16; 'all.': 0.16; 'language': 0.16; 'wrote:': 0.18; 'basically': 0.19; 'have:': 0.19; 'value.': 0.19; 'input': 0.22; 'print': 0.22; 'header:User-Agent:1': 0.23; 'choices': 0.24; '---': 0.24; 'header:X-Complaints-To:1': 0.27; 'header:In-Reply-To:1': 0.27; 'function': 0.29; "doesn't": 0.30; 'fine,': 0.31; 'but': 0.35; 'add': 0.35; 'choosing': 0.36; 'to:addr:python-list': 0.38; 'to:addr:python.org': 0.39; 'received:org': 0.40; 'how': 0.40; 'free': 0.61; 'viruses': 0.61; 'here:': 0.62; 'email addr:gmail.com': 0.63; 'protection': 0.63; 'our': 0.64; 'for:': 0.64; 'total': 0.65; 'antivirus': 0.68; 'courses,': 0.84; 'received:2': 0.84 X-Injected-Via-Gmane: http://gmane.org/ To: python-list@python.org From: Mark Lawrence Subject: Re: Combination Function Help Date: Wed, 12 Feb 2014 15:40:48 +0000 References: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Gmane-NNTP-Posting-Host: host-2-98-192-220.as13285.net User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:24.0) Gecko/20100101 Thunderbird/24.3.0 In-Reply-To: X-Antivirus: avast! (VPS 140212-0, 12/02/2014), Outbound message X-Antivirus-Status: Clean X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Newsgroups: comp.lang.python Message-ID: Lines: 48 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1392219671 news.xs4all.nl 2972 [2001:888:2000:d::a6]:54916 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:66047 On 12/02/2014 15:20, kjakupak@gmail.com wrote: > So I need to write a function based off of nCr, which I have here: > > def choices(n, k): > if n == k: > return 1 > if k == 1: > return n > if k == 0: > return 1 > return choices(n - 1, k) + choices(n - 1, k - 1) > > It works fine, but then I need to add in so that the user can have an input box for n and k. > > def choices(n, k): > if k == 1: > return n > if n == k: > return 1 > if k == 0: > return 1 > return choices(n - 1, k) + choices(n - 1, k - 1) > > n_input = int(input("Number of courses you like: ")) > k_input = int(input("Number of courses you can register for: ")) > > The above doesn't return any value at all. And then I need it to print the total number of ways of choosing k out of n courses, which I only have: > > print ("Total number of ways of choosing %d out of %d courses: " % (n_input, k_input)) > > > So basically I need help figuring out why it won't return any value and how to print that final value. > Actually calling choices with n_input and k_input as inputs might help your cause. -- My fellow Pythonistas, ask not what our language can do for you, ask what you can do for our language. Mark Lawrence --- This email is free from viruses and malware because avast! Antivirus protection is active. http://www.avast.com