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Python Factorial code program


Python factorial code of a number : For an integer n greater than or equal to 1, the factorial is the product of all integers less than or equal to n but greater than or equal to 1. The factorial value of 0 is defined as equal to 1. The factorial values for negative integers are not defined.

python factorial code

For eg : factorial of 5 i.e 5!=5*4*3*2*1=120.

While calculating permutation and combination, Factorial program can be referred.

Python Factorial code

print ': Factorial:\n'
def Factorial():
    n = input ('Enter the number to find factorial: ')
    fact=1
    for i in range(1,n+1):
       fact=fact*i
    print('Factorial of a number %d is %d'%(n,fact))

Output :

: Factorial:

>>> Factorial()
Enter the number to find factorial: 5
Factorial of a number 5 is 120
>>>