Tim Peters added the comment: FYI, my results match Serhiy's, on Windows, under Pythons 3.4.2 and 2.7.8.
It's not surprising to me. Since IEEE 754 standardized sqrt, most vendors complied, delivering a square root "as if infinitely precise" with one anally correct rounding. But unless the platform pow() special-cases 0.5, that's going to involve a logarithm, multiplication, and exponentiation under the covers. pow() implementations usually fake some "extra precision" (else the worst-case errors can be horrendous), but it's still not always the same as single-rounding. Raymond, I didn't understand this part: "It's odd because your two result as same number, just displayed differently." The output immediately following that showed they _are_ different numbers on your box too (the .hex() outputs differ by one in the last place). ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue24059> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
