
Re: How to avoid wrong answers in simple arithmetic expressions.
Posted:
Jan 20, 2013 6:30 AM


"Bruno Luong" <b.luong@fogale.findmycountry> wrote in message <kdghtg$2gl$1@newscl01ah.mathworks.com>... > OK if you don't like negative power I give you an example of positive power that contradict what you said: > [The IEEE 754 format description on Wikipedia was a bit confusing  all those negative powers of 2! It really boils down to  if a number can be represented as a sum of powers of 2] > > Which is wrong statement. Why, because: > > 2^100 can be represents by IEEE > (2^100 + 1) cannot. > > Both are sum of power of 2. > > Bruno
All right, suppose I say all integers between 2^52 and 2^52 can be represented exactly  I did say "within some range" without specifying what that range was. But I get your point, which I presume is that  not all integers from realmin to realmax can be exactly represented  a fact that can easily be forgotten in haste.
Best Regards.

