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Message: [QUOTE="trans. (T. Onoma), post: 4446191"] On Friday 15 October 2004 07:23 pm, [email]markus@reality.com[/email] wrote: | > puts 0.5.round #=> 1 | > puts sprintf("%.0f", 0.5) #=> 0 | | Both are (IIRC) ISO 31-0 conformant, but one uses ISO 31-0 B.3 rule A | and the other uses ISO 31-0 B.3 rule B. | | That said, one of the rules (the one sprintf uses, to round down | following even digits is an abomination and should be eliminated from the | face of the earth. nnn.nn5 should ALWAYS round up and rounded values | should not be re-rounded (which is what the contrary rule assumes is | happening). Apparently the idea of even vs. odd rounding was to help prevent "inflational" rounding --successive rounding pushing values upward. I think K&R actually supported the idea. I'm not sure how I feel about it. T. [/QUOTE]