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0 pointsjonhohle10y ago0 comments

So don't use a lossy floating point representation and use arbitrary precision instead.

Just because π is estimated to 15 significant digits doesn't mean the entire calculation needs to be.

0 comments

Arbitrary precision is not a valid answer: every multiplication doubles the number of mantissa bits. Starting with a 64-bit precision, after just 40 multiplications, you will have consumed 800 GB of RAM just for storing a single number, at which point you'll ask yourself: how many decimal digits do I really need? Which was the initial question...

WalterBright10y ago

Pi cannot be stored exactly even with arbitrary precision.

j / k navigate · click thread line to collapse

0 pointsjonhohle10y ago0 comments

So don't use a lossy floating point representation and use arbitrary precision instead.

Just because π is estimated to 15 significant digits doesn't mean the entire calculation needs to be.

0 comments

notjpl10y ago

WalterBright10y ago

Pi cannot be stored exactly even with arbitrary precision.

j / k navigate · click thread line to collapse