[sc-users] Re: Re: How many years?

[Tim Blechmann <tim@xxxxxxxxxx>]

> But the computer doesn't knows that :-/
> I can't find a reference or explanation nor can deduce it myself.
> 
> 0.33333333333333 * 3; // 0.99999999999999
> 0.33333333333334 * 3; // 1
> 0.33333333333335 * 3; // 0.0000000000001
> 0.333333333333333 * 3 // 1
> 
> Is this a feature of the floating point representation?
> When one is one?

well, floating point numbers are not able to represent the number 1/3. [1] 
may be interesting to read, as it describes some of the problems of using 
floating-point math.

cheers, tim

[1] http://en.wikipedia.org/wiki/Floating_point#Accuracy_problems



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