[EMAIL PROTECTED] (SZUCS Gábor) writes: > As Tom pointed out, it isn't a floating point failure -- it is how rounding > float is implemented. I assume anything with less than 15 digits can be > exactly represented as float.
No, "decimal" fractions cannot ever be exactly represented in floating point because since they use powers of two, you wind up with repeated fractions. 1/3 is approximately 0.3333333, but you cannot present that exactly in decimal. In the very same way, 1/10 is approximately equal to 0.001001001001001001001001001001 (as a binary 'fraction'); the '001' part is a repeating group, and wherever you terminate it, you lose exactness. -- (reverse (concatenate 'string "ofni.smrytrebil" "@" "enworbbc")) <http://dev6.int.libertyrms.com/> Christopher Browne (416) 646 3304 x124 (land) ---------------------------(end of broadcast)--------------------------- TIP 5: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faqs/FAQ.html
