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Program to Print Factorial of a Number in Python

Factorial is a non-negative integer. It is the product of all positive integers less than or equal to that number you ask for factorial. It is denoted by an exclamation sign (!).


num = int(input("Enter a number: "))    
factorial = 1    
if num < 0:    
   print(" Factorial does not exist for negative numbers")    
elif num == 0:    
   print("The factorial of 0 is 1")    
   for i in range(1,num + 1):    
       factorial = factorial*i    
   print("The factorial of",num,"is",factorial)


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