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import time
def factorial_recursive(number):
""" Define a factorial function in recursive flavor """
result = 1
if number > 0:
result = number * factorial_recursive(number - 1)
print 'factorizing: ', number, ' result: ', result
return result
def factorial_iterative(number):
""" Define a factorial function in iterative flavor """
result = 1
for i in range(1, number + 1):
result = result * i
print 'factorizing: ', i, ' result: ', result
return result
def calculate(number, type):
""" Calculate factorial using recursive and iterative methods """
start = time.time()
if type == 0:
type_s = 'recursive'
factorial_recursive(number)
else:
type_s = 'iterative'
factorial_iterative(number)
delta = time.time() - start
if delta > 0:
print 'Type: ', type_s, ' in: ', 1 / delta
else:
print 'Type: ', type_s
# ask for a number to compute the factorial of
number = input('Please input a number:')
print 'Calculating...'
calculate(number, 0)
calculate(number, 1)
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