Factoring n in Python

This question requires the preparation of procedures , Calculation N The factorial .

Input format ： Input gives a positive integer on a line N.

Output format ： In a row, press “product = F” Output the value of factorial in the format of F, Please note that there is a space to the left and right of the equal sign . The calculation results should not exceed the double precision range .

sample input :

5

sample output :

product = 120
x = int(input()) a = 1 for i in range(1, x+1): a = a*i print("product = %d" % float(a)) 

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