factorial of a number using function and without using function in Python

factorial()

factorial is the product of all the positive integers less than or equal to input number.
!n is also denoted as factorial of a number .

import math
print(math.factorial(4))    # 24

factorial of 4 is 24.

import math
print(math.factorial(12))    # 479001600

Factorial of a number without using the factorial() function

n=12
factorial=1
for i in range (1,n+1):
    factorial=factorial * i
print(factorial)

Output is here

479001600

Practice Questions

Find the factorial of an input number. check the number before using factorial() method.
Check your answer without importing math module.

import math
x=input("Enter the number : ")
if x.isdigit():
  print(math.factorial(int(x)))
else:
  print(" Enter correct number ")

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