In this Python program, we will learn how to find the factorial of a number.
In mathematics, the factorial of a positive integer n, denoted by n! is the product of all positive integers less than or equal to n:
The factorial, symbolized by an exclamation mark (!), is a quantity defined for all integers greater than or equal to 0.
The value of 0! is 1.
Here is the source code to find the factorial of a number.
# Python Program to Find the Factorial of a Number # To take input from the user num = int(input("Enter a number: ")) factorial = 1 # check if the number is negative, positive or zero if num < 0: print("Sorry, factorial does not exist for negative numbers") elif num == 0: print("The factorial of 0 is 1") else: for i in range(1,num + 1): factorial = factorial*i print("The factorial of",num,"is",factorial)
Enter a number: 5
The factorial of 5 is 120