http://www.evanmiller.org/a-review-of-perl-6.html
has Scientific notation (such as 1e-1 for 1×10-1) always produces a floating-point Num in Perl 6. For reasons I don’t understand, however, they sometimes seem to add up as rationals, rather than floating-point: > 0.1e0 + 0.2e0 == 0.3e0 False > 1e-1 + 2e-1 == 3e-1 True Maybe someone can explain the discrepancy to me in a polite email. Anyway, I wholeheartedly endorse Perl 6’s use of rational numbers for exact arithmetic, and I think more languages could benefit from a similar implementation. For reference, Julia and Haskell have built-in rationals, constructed (respectively) with the // and % operators; most other languages have them as a library, if at all, without support for literals. Is this a surprise? Is there an explanation? -- a Andy Bach, afb...@gmail.com 608 658-1890 cell 608 261-5738 wk
