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peterc/pi.rb

Created February 23, 2013 13:34
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Calculating pi using the Monte Carlo method
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pi.rb
r = 5
points_total = 0
points_inside = 0
loop do
points_total += 1
x, y = rand * r * 2 - r, rand * r * 2 - r
points_inside += 1 if (x ** 2 + y ** 2) < (r ** 2)
puts "#{points_inside}/#{points_total}: pi == #{4 * points_inside / points_total.to_f}" if points_total % 10000 == 0
end
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