Created
October 12, 2020 17:32
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def calcPi(limit): # Generator function | |
""" | |
Prints out the digits of PI | |
until it reaches the given limit | |
""" | |
q, r, t, k, n, l = 1, 0, 1, 1, 3, 3 | |
decimal = limit | |
counter = 0 | |
while counter != decimal + 1: | |
if 4 * q + r - t < n * t: | |
# yield digit | |
yield n | |
# insert period after first digit | |
if counter == 0: | |
yield '.' | |
# end | |
if decimal == counter: | |
print('') | |
break | |
counter += 1 | |
nr = 10 * (r - n * t) | |
n = ((10 * (3 * q + r)) // t) - 10 * n | |
q *= 10 | |
r = nr | |
else: | |
nr = (2 * q + r) * l | |
nn = (q * (7 * k) + 2 + (r * l)) // (t * l) | |
q *= k | |
t *= l | |
l += 2 | |
k += 1 | |
n = nn | |
r = nr | |
def main(): # Wrapper function | |
# Calls CalcPi with the given limit | |
pi_digits = calcPi(int(input( | |
"Enter the number of decimals to calculate to: "))) | |
i = 0 | |
# Prints the output of calcPi generator function | |
# Inserts a newline after every 40th number | |
for d in pi_digits: | |
print(d, end='') | |
i += 1 | |
if i == 40: | |
print("") | |
i = 0 | |
if __name__ == '__main__': | |
main() |
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