Bug #7024

90 * 1.1 => 99.00000000000001

Added by Julien Grillot over 1 year ago. Updated over 1 year ago.

[ruby-core:47535]
Status:Rejected
Priority:Normal
Assignee:-
Category:core
Target version:1.9.3
ruby -v:ruby 1.9.3p194 (2012-04-20 revision 35410) [i686-linux] Backport:

Description

$ ruby -v
ruby 1.9.3p194 (2012-04-20 revision 35410) [i686-linux]
$ irb
1.9.3p194 :001 > 901.1
=> 99.00000000000001
1.9.3p194 :002 > 90.0
1.1
=> 99.00000000000001

Expected value: 99.0

Thanks for your job every one!

History

#1 Updated by Marc-Andre Lafortune over 1 year ago

  • Status changed from Open to Rejected

This is expected from floating point calculations; you'll get this result in other languages too.

Checkout http://0.30000000000000004.com/

#2 Updated by Alexey Muranov over 1 year ago

Julien, try

(90 * Rational(11, 10)).to_f

or

(90 * '1.1'.tor).tof

or

(90 * 1.1.rationalize).to_f

Also available in: Atom PDF