## How to calculate the factorial of **43**

To find 43 factorial, or **43!**,
simply use the formula that multiplies the number 43 by all positive whole numbers less than it.

Let's look at how to calculate the Factorial of
**Forty-three ** :

**43!** is exactly : **60415263063373835637355132068513997507264512000000000**

Factorial of **43** can be calculated as:

**43!** = **43 x 42 x 41 x 40 x ... x 3 x 2 x 1**

The number of trailing zeros in
**43!** is **10**

The number of digits in **43** factorial is **53**.

## Factorials of Numbers similar to **43**

## What Is Factorial?

A factorial is displayed by an integer and an exclamation symbol. In math concepts, factorial is a multiplication function 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 find the "n" way elements can be established .

## Factorial Formula

To find the factorial of any given number, alternate the 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 together to receive the factorial of the number.

We can also figure out a factorial from the previous 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 :

**43!** Factorial =
43 x 42 x 41 x 40 x ... x 3 x 2 x 1 =
43 × 42! =
60415263063373835637355132068513997507264512000000000

## 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.