[Haskell-cafe] Sinus in Haskell

Jules Bean jules at jellybean.co.uk
Sat Nov 10 05:40:20 EST 2007

Brent Yorgey wrote:
> More generally, this is due to the fact that floating-point numbers can 
> only have finite precision, so a little bit of rounding error is 
> inevitable when dealing with irrational numbers like pi.   This problem 
> is in no way specific to Haskell.

But some systems always display to a slightly lower precision than they 
calculate. Some pocket calculators work like this, and I suspect some 
programming languages might. You can conceal the first few instances of 
rounding errors this way (until they get a bit bigger and punch through 
your reduced precision).


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