[R] What is ".Machine$double.eps"?

[S Ellison]

See  ?.Machine


>>> "Saji Ren" <saji.ren at gmail.com> 24/12/2009 06:07:27 >>>
Hello,everyone:

I met this notation when I read the original code of function
"quantile".There is one sentence as below:
>eps <- 100 * .Machine$double.eps

when I input ".Machine$double.eps" in R, it returns "[1]
2.220446e-16".
Can anyone show me the exact meaning about that?

thanks

Saji from Shanghai
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