# What is 6 factorial ?

Steps to calculate factorial of 6

## How to calculate the factorial of 6

To find 6 factorial, or 6!, simply use the formula that multiplies the number 6 by all positive whole numbers less than it.

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

6! is exactly : 720

Factorial of 6 can be calculated as:
6! = 6 x 5 x 4 x 3 x 2 x 1

The number of trailing zeros in 6! is 1

The number of digits in 6 factorial is 3.

## What Is Factorial?

A factorial is symbolized by an integer and an exclamation mark. In arithmetic, factorial is a multiplication process of natural numbers .

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

Symbolically, it is represented as "!".

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

## Factorial Formula

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

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

The expansion of the formula shows the numbers to be replicated together to find the factorial of the number.

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

So the rule is : n! = n × (n−1)!

Example :
6! Factorial = 6 x 5 x 4 x 3 x 2 x 1 = 6 × 5! = 720

## 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 corresponding to 1. So, 0! = 1.