From: Yui NARUSE <naruse@...>
Date: 2011-09-06T10:51:12+09:00
Subject: [ruby-core:39294] [Ruby 1.9 - Bug #5272] Float#round doesn't round big values


Issue #5272 has been updated by Yui NARUSE.

ruby -v set to ruby 1.9.4dev (2011-08-05 trunk 32856) [x86_64-darwin11.0.0]

This issue still happends:
Float("2.5e-22").round(22) #=> 2.0e-22aaaaaa
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Bug #5272: Float#round doesn't round big values
http://redmine.ruby-lang.org/issues/5272

Author: Marc-Andre Lafortune
Status: Assigned
Priority: Normal
Assignee: Marc-Andre Lafortune
Category: 
Target version: 1.9.3
ruby -v: ruby 1.9.4dev (2011-08-05 trunk 32856) [x86_64-darwin11.0.0]


For large enough values (outside of Fixnum range), Float#round does not round at all but simply truncates:

  2.999999999999999e20.round(-20) # => 200000000000000000000

Fixed in trunk, but would be nice to backport for Ruby 1.9.3.



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