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Ruud H.G. van Tol on Sat, 14 Dec 2024 12:07:36 +0100
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- To: pari-users <pari-users@pari.math.u-bordeaux.fr>
- Subject: digits of a float
- From: "Ruud H.G. van Tol" <rvtol@isolution.nl>
- Date: Sat, 14 Dec 2024 12:07:29 +0100
- Delivery-date: Sat, 14 Dec 2024 12:07:36 +0100
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How to properly isolate a digit of a float?
Example:
? my(n=19437); localprec(n+2); Pi *10^(n-1) \1 %10
%4 = 7
? my(n=19437); localprec(n+3); Pi *10^(n-1) \1 %10
%5 = 6
That type of code depends on the number of 9-digits in the decimal
expansion of the value.
See also https://oeis.org/A000796, which uses localprec(n*6\5+29).
What clean ways are there?
-- Ruud