The “**Factorial Calculator**” is a handy tool that allows you to quickly and accurately calculate the factorial of a given number. With this tool, you can effortlessly determine the factorial value of any positive integer, making it ideal for mathematical calculations and problem-solving.

## Factorial Calculator Tool

## How to Calculate a Factorial

To calculate the factorial of a number, you multiply that number by all positive integers less than down to 1. The factorial of a non-negative integer n is denoted by n! and is calculated as:

n! = n × (n-1) × (n-2) × ... × 3 × 2 × 1

Here's an example of how to calculate the factorial of a number:

Let's say you want to calculate the factorial of 5 (5!). You would multiply 5 by all the positive integers less than it down to 1:

5! = 5 × 4 × 3 × 2 × 1 = 120

So, the factorial of 5 is 120.

Here's a general algorithm to calculate the factorial of a number:

- Set the factorial variable to 1.
- Start a loop from 1 to the desired number, incrementing by 1 in each iteration.
- Multiply the factorial variable by the loop counter in each iteration.
- After the loop ends, the factorial variable will contain the factorial of the desired number.