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How to print factorial in Python?

#will output the factorial for an input

num = int(input("give a number:"))
new_num = num + 1

factorial = 1

# check if the number is negative, positive or zero
if num < 0:
   print("factorial does not exist")
elif num == 0:
   print("factorial of 0 is 1")
   for i in range(1, new_num):
       factorial = factorial*i
   print("The factorial of" , num , "is" , factorial)
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