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Add links about floating point. [ruby-core:31849]

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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@29131 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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naruse 2010-08-29 00:42:05 +00:00
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numeric.c
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@ -533,6 +533,13 @@ num_to_int(VALUE num)
* <code>Float</code> objects represent inexact real numbers using
* the native architecture's double-precision floating point
* representation.
*
* Floating point has a different arithmetic and is a inexact number.
* So you should know its esoteric system. see following:
*
* - http://docs.sun.com/source/806-3568/ncg_goldberg.html
* - http://wiki.github.com/rdp/ruby_tutorials_core/ruby-talk-faq#floats_imprecise
* - http://en.wikipedia.org/wiki/Floating_point#Accuracy_problems
*/
VALUE