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From: markspace <-@.>
Newsgroups: comp.lang.java.programmer
Subject: Re: How to do Combinations/Permutations in BlueJ
Date: Wed, 07 Nov 2012 23:03:17 -0800
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On 11/7/2012 8:53 PM, lebaz95@gmail.com wrote:
> On Wednesday, November 7, 2012 8:28:19 PM UTC-6, leb...@gmail.com
> wrote:
>> I would like to create a program that will do problems like
>> (xa+yb)^z. But I would need to do things like (5!/3!(5-3)!) How
>> would I get this done?
>
> rslt = 1; for(i = e; i > 0; i --) { rslt *= i; }
>
> I asked my brother and he helped me. e in this program is a user
> input so you may replace it as you see fit.


In the real world, people call this a factorial.  Here's a fun article 
on the subject:

<http://chaosinmotion.com/blog/?p=622>