[Haskell-cafe] Why 'round' does not just round numbers ?
Martijn van Steenbergen
martijn at van.steenbergen.nl
Mon Oct 27 11:41:36 EDT 2008
Ketil Malde wrote:
> Of course, Haskell should discard the rather tasteless IEEE754 crud,
> and do its calculations on infinite streams of digits. Then, rounding
> upwards after 'take'ing a sufficient amount of decimals will be the
> right thing to do.
Except arbitrary-precision real arithmetic is not as trivial as you make
it sound, and using an infinite stream of digits is not sufficient by
See also: http://www.haskell.org/haskellwiki/Exact_real_arithmetic
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