# Gregory-Leibniz formula for 'pi' # http://en.wikipedia.org/wiki/Leibniz_formula_for_%CF%80 def calcPi(n): pi,numer = 0,4.0 for i in range(n): denom = (2*i+1) term = numer/denom if i%2: pi -= term else: pi += term return(pi) # here we use 16000 terms - try higher numbers, and lower ones too print(calcPi(16000))
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