On Tuesday, May 28, 2013 3:48:17 PM UTC+2, Steven D'Aprano wrote: > On Mon, 27 May 2013 13:11:28 -0700, Ahmed Abdulshafy wrote: > > > > > That may be true for integers, but for floats, testing for equality is > > > not always precise > > > > Incorrect. Testing for equality is always precise, and exact. The problem > > is not the *equality test*, but that you don't always have the number > > that you think you have. The problem lies elsewhere, not equality! > > > Steven
Well, this is taken from my python shell> >>> 0.33455857352426283 == 0.33455857352426282 True Anyway, man, those were not my words anyway, most programming books I've read state so. Here's an excerpt from the Python book, I'm currently reading> ">>> 0.0, 5.4, -2.5, 8.9e-4 (0.0, 5.4000000000000004, -2.5, 0.00088999999999999995) The inexactness is not a problem specific to Python—all programming languages have this problem with floating-point numbers." -- http://mail.python.org/mailman/listinfo/python-list
