# Factorial Calculator

'**Factorial Calculator**' is an online tool that helps to calculate the factorial of a given number.

## What is Factorial Calculator?

Online Factorial Calculator helps you to calculate the factorial of a given number within a few seconds.

### Factorial Calculator

**NOTE:** Please enter the values upto two digits only.

## How to Use Factorial Calculator?

Please follow the below steps to find the factorial of a given number:

**Step1:**Enter the number in the given input box.**Step 2:**Click on the**"Calculate"**button to find the factorial of a given number.**Step 3:**Click on the**"Reset"**button to clear the fields and find the factorial of a given number for different values.

## How to Find Factorial?

A factorial of a number is defined as a function which multiplies the number by every natural number below it. Symbolically the factorial can be represented as "!"

So, n factorial is the product of first n natural numbers, represented as **n!**

**Factorial n! = n (n-1) (n-2) …………………….(3)(2)(1) or n! = n (n-1)! **

**Solved Examples on Factorial Calculator**

**Example 1:**

Find the 5! and verify it using online factorial calculator.

**Solution:**

Factorial n! = n (n-1) (n-2) …………………….(3)(2)(1)

= 5 (5 - 1) (5 - 2) (5 - 3) (5 - 4) (5 - 5)!

= 5 × 4 × 3 × 2 × 1 × 0! [0! = 1]

= 120

**Example 2:**

Find the 7! and verify it using online factorial calculator.

**Solution:**

Factorial n! = n (n-1) (n-2) …………………….(3)(2)(1)

= 7 (7 - 1) (7 - 2) (7 - 3) (7 - 4) (7 - 5) (7 - 6) (7 - 7)!

= 7 × 6 × 5 × 4 × 3 × 2 × 1 × 0! [0! = 1]

= 5040

**Example 3:**

Find the 6! and verify it using online factorial calculator.

**Solution:**

Factorial n! = n (n-1) (n-2) …………………….(3)(2)(1)

= 6 (6 - 1) (6 - 2) (6 - 3) (6 - 4) (6 - 5) (6 - 5)!

= 6 × 5 × 4 × 3 × 2 × 1 × 0! [0! = 1]

= 720

Similarly, you can try the calculator to find the factorial of any number

a) 10!, b) 7!, c) 13!

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