# What is 43 factorial ?

Steps to calculate factorial of 43

## 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.

## 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.