
Create a program to continually calculate and output the next decimal digit of   



π


{\displaystyle \pi }

   (pi).

The program should continue forever (until it is aborted by the user) calculating and outputting each decimal digit in succession.

The output should be a decimal sequence beginning   3.14159265 ...



Note: this task is about   calculating   pi.   For information on built-in pi constants see Real constants and functions.



Related Task Arithmetic-geometric mean/Calculate Pi

BigInteger q = 1, r = 0, t = 1, k = 1, n = 3, l = 3
String nn
boolean first = true
 
while (true) {
    (nn, first, q, r, t, k, n, l) = (4*q + r - t < n*t) \
        ? ["${n}${first?'.':''}", false, 10*q, 10*(r - n*t), t  , k    , 10*(3*q + r)/t - 10*n    , l    ] \
        : [''                   , first, q*k , (2*q + r)*l , t*l, k + 1, (q*(7*k + 2) + r*l)/(t*l), l + 2]
    print nn
}