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From: "Nasser M. Abbasi" <nma@12000.org>
Newsgroups: comp.lang.java.programmer
Subject: Re: higher precision doubles
Date: Sat, 10 Sep 2011 21:53:40 -0700
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On 8/6/2011 12:24 PM, Jan Burse wrote:
>
>
> Motivating example, in Go we have:
>
>       func main() {
> 	x := math.Sin(2*math.Pi)
> 	fmt.Printf("x = %.30f, is zero = %v\n", x, x == 0)
>       }
>
>       x = 0.000000000000000000000000000000, is zero = true
>
> In Java we have:
>
...
  
>
>
>       zero1=-2.4492935982947064E-16
>       zero2=-2.4492935982947064E-16

Well, both as not correct :)

Here is the correct math answer

Mathematica:

x = Sin[2 Pi]
      
     0

An exact zero. As was created by God. Not a floating point zero.

--Nasser