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Ingy döt Net 2023-07-01 11:58:00 -04:00
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commit cb5bb5e222
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Task/Arithmetic-geometric-mean-Calculate-Pi/Sidef/arithmetic-geometric-mean-calculate-pi.sidef Normal file
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func agm_pi(digits) {
var acc = (digits + 8);
local Num!PREC = 4*digits;
var an = 1;
var bn = sqrt(0.5);
var tn = 0.5**2;
var pn = 1;
while (pn < acc) {
var prev_an = an;
an = (bn+an / 2);
bn = sqrt(bn * prev_an);
prev_an -= an;
tn -= (pn * prev_an**2);
pn *= 2;
}
((an+bn)**2 / 4*tn).to_s
}
say agm_pi(100);