# What is 12 factorial ?

Steps to calculate factorial of 12

## How to calculate the factorial of 12

To find 12 factorial, or 12!, simply use the formula that multiplies the number 12 by all positive whole numbers less than it.

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

12! is exactly : 479001600

Factorial of 12 can be calculated as:
12! = 12 x 11 x 10 x 9 x ... x 3 x 2 x 1

The number of trailing zeros in 12! is 2

The number of digits in 12 factorial is 9.

## What Is Factorial?

A factorial is showed by an integer and an exclamation mark. In math concepts, factorial is a multiplication treatment of natural numbers .

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

Symbolically, it is represented as "!".

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

## Factorial Formula

To find the factorial of any given number, exchange the exact value for n in the given rule :

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

The expansion of the formula provides the numbers to be replicated to each other to obtain the factorial of the number.

We can also measure a factorial from the prior one. The factorial of any number is that number times the factorial of (that number minus 1).

So the rule is : n! = n × (n−1)!

Example :
12! Factorial = 12 x 11 x 10 x 9 x ... x 3 x 2 x 1 = 12 × 11! = 479001600

## 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 integer factorials are undefined

### What Is 0!

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