## How to calculate the factorial of **11**

To find 11 factorial, or **11!**,
simply use the formula that multiplies the number 11 by all positive whole numbers less than it.

Let's look at how to calculate the Factorial of
**Eleven ** :

**11!** is exactly : **39916800**

Factorial of **11** can be calculated as:

**11!** = **11 x 10 x 9 x 8 x ... x 3 x 2 x 1**

The number of trailing zeros in
**11!** is **2**

The number of digits in **11** factorial is **8**.

## Factorials of Numbers similar to **11**

## What Is Factorial?

A factorial is displayed by an integer and an exclamation symbol. In Mathematics, factorial is a multiplication procedure of natural numbers .

It multiplies the number by every noreal number that is less than it .

Symbolically, it is symbolized as "!".

The function is used, among other things, to find the "n" way elements can be structured .

## Factorial Formula

To find the factorial of any given number, substitute the exact value for n in the given formulation :

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

The expansion of the formula gives the numbers to be multiplied together with each other to obtain the factorial of the number.

We can also work out a factorial from the previous one. The factorial of any number is that number replicated the factorial of (that number minus 1).

So the rule is : n! = n × (n−1)!

Example :

**11!** Factorial =
11 x 10 x 9 x 8 x ... x 3 x 2 x 1 =
11 × 10! =
39916800

## What are Factorials Used For?

The best use of factorial is in Combinations and Permutations.

Example : Determine how to arrange letters without repeating?

There one way for 1 letter "a":

2 ways for two letters "ab": ab, ba.

There are 6 ways for 3 letters "abc": abc acb cab bac bca.

There are 24 ways for 1234 of the letters "abcd"

## Frequently Asked Questions on Factorial

### Can we have factorials for negative numbers ?

Negative number factorials are undefined

### What Is 0!

Zero factorial or Factorial of 0 is simple, and its value is corresponding to 1. So, 0! = 1.