Write a program that lets the user enter a nonnegative integer and then uses a loop to calculate the factorial of that number. Print the factorial to standard output. Sample Run code example

Example 1: Find faculty of a number python

#Assumes n is possitive
def factorial(n):
  return 1 if n <=1 else n*factorial(n-1)

Example 2: factorial in python

def fact(n):
	if n==0 or n==1:
		return 1
	else:
		return n*fact(n-1)
print(fact(4)) #4 is the sample value it will returns 4!==> 4*3*2*1 =24
#OR
import math
print(math.factorial(4))