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cdarringer/pi.py

Last active August 29, 2015 14:17
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Random number pi calculator
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pi.py
"""Calculate pi using a random number generator
Calculate pi with progressively increasing accuracy using a random
number generator and some basic properties about circles and area.
Happy "pi day"!
author: Chris Darringer
"""
import random
import math
RADIUS = 100000
MAX_TEST_COUNT = 3000000
UPDATE_PERIOD = 100000;
def main():
random.seed()
inCount = 0
for i in range(1, MAX_TEST_COUNT + 1):
x = random.randint(-1 * RADIUS, RADIUS)
y = random.randint(-1 * RADIUS, RADIUS)
distanceFromCenter = math.sqrt(x**2 + y**2)
if (distanceFromCenter <= RADIUS):
inCount += 1
if ((i % UPDATE_PERIOD) == 0):
print 'After', i, 'tests, pi is', str(4 * (float(inCount) / i))
main()
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