Factorial Program Without Using Functions In Python

In this tutorial, we will learn how to find the factorial of a given number without using the inbuilt function present in the Python library.

Discover how to calculate the factorial of a number without recursion using Python. Detailed instructions and code snippets included.

Python program to find the factorial of a number provided by the user using recursion def factorialx quotquotquotThis is a recursive function to find the factorial of an integerquotquotquot if x 1 or x 0

The factorial of a positive integer n is the product of all positive integers less than or equal to n. The factorial of a number is represented by the symbol quot!quot . For example, the factorial of 5 is 5 4 3 2 1 120. Here is a Python function that calculates the factorial of a given number using a for loop

We will be using the same concept to find the factorial of a number without using asterisk. Follow the steps below to solve the problem Take a variable of integer type here n which would store the value of which we're finding the factorial. Initialize a variable here p which would serve to be the factorial of n. Start iterating from n to 1.

ProgramSource Code Here is source code of the Python Program to find the factorial of a number without using recursion. The program output is also shown below.

The easiest way is to use math.factorial available in Python 2.6 and above import math math.factorial1000 If you wanthave to write it yourself, you can use an iterative approach def factorialn fact 1 for num in range2, n 1 fact num return fact or a recursive approach def factorialn if n lt 2 return 1 else return n factorialn-1 Note that the factorial function is

Method 1 Using the numpy library import numpy num int input quotEnter a number whose factorial you want quot if num lt 0 print quotOpps!, The number you entered is negative.

This is the simplest method where Python's math.factorial function is used to calculate the factorial of number 5. It abstracts away the logic of factorial calculation and provides a ready-to-use, efficient solution.

The factorial of a number is the product of all positive integers less than or equal to that number. For example, the factorial of 5 denoted as 5! is 5 4 3 2 1 120. In Python, we can calculate the factorial of a number using various methods, such as loops, recursion, built-in functions, and other approaches.