# CIS 122 # Ch.5 Program Ex 12: Calculating the Factorial of a Number. # Written by Lee Her. # Last modified on 04/24/2015 #Enter a factorial number number = int(input('Enter a number: ')) print number factorial = 1 #Validation of factorial number if number <= 0: print 'Invalid number, factorial are positive numbers and not equal to 0' else: for i in range(1, 1 + number): factorial = i * factorial print "The factorial of {} ".format(number) + "is {}".format(factorial) #End
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