Click run. Leave it for a while and it will give you an approximation of Pi. The longer you leave it the more accurate the value of Pi - see below. Press the space bar to stop the calculation and find your value of Pi.
Uses the Gregory series to calculate an approximate value of Pi. This series is notoriously slow to converge. So although it will be accurate to 3 places almost immediately, running in turbo mode for two hours it is only accurate to 8 decimal places. (Easier to just look it up - 3.141592653589793238462643383279502884197169399375105820974944592307816406286 but I think the program would get there if left long enough!)
