FAQ Topic - How do I generate a random integer from 1 to n? (2010-08-01)
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From: FAQ server on 31 Jul 2010 19:00 ----------------------------------------------------------------------- FAQ Topic - How do I generate a random integer from 1 to n? ----------------------------------------------------------------------- `Math.random()` returns a value `R` such that `0 <= R < 1.0`; therefore: // positive integer expected function getRandomNumber(n) { return Math.floor(n * Math.random()); } - gives an evenly distributed random integer in the range from `0` to `n - 1` inclusive; use `getRandomNumber(n)+1` for `1` to `n`. <URL: http://msdn.microsoft.com/en-us/library/41336409%28VS.85%29.aspx> <URL: http://docs.sun.com/source/816-6408-10/math.htm> How to Deal and Shuffle, see in: <URL: http://www.merlyn.demon.co.uk/js-randm.htm> The complete comp.lang.javascript FAQ is at http://jibbering.com/faq/ -- The sendings of these daily posts are proficiently hosted by http://www.pair.com.
From: Dr J R Stockton on 2 Aug 2010 16:12
In comp.lang.javascript message <4c54aafa$0$277$14726298(a)news.sunsite.dk >, Sat, 31 Jul 2010 23:00:03, FAQ server <javascript(a)dotinternet.be> posted: >FAQ Topic - How do I generate a random integer from 1 to >n? >How to Deal and Shuffle, see in: <URL: http://www.merlyn.demon.co.uk/js >-randm.htm> Should be To Shuffle, Deal, or Draw, see via: <URL: http://www.merlyn.demon.co.uk/js-randm.htm>. -- (c) John Stockton, nr London, UK. ?@merlyn.demon.co.uk Turnpike v6.05 MIME. Web <URL:http://www.merlyn.demon.co.uk/> - FAQqish topics, acronyms & links; Astro stuff via astron-1.htm, gravity0.htm ; quotings.htm, pascal.htm, etc. No Encoding. Quotes before replies. Snip well. Write clearly. Don't Mail News. |