Question

What are factorial numbers ?

Answer 1

Define factorial numbers.

A number's factorial seems to be the expression that multiplies it by each natural integer underneath it. It comes in handy whenever we want to figure out how many different arrangements there would be for objects or even how many various approaches we possibly combine items.

The factorial function may be expressed as "$n!$".

It can be evaluated as,

$n!=n\times \left(n-1\right)\times ···\times 2\times 1$

For example:

$\begin{array}{rcl}3!& =& 3\times 2\times 1\\ & =& 6\end{array}$

Therefore, factorial seems is the product of all positive integers less than or equal to that particular positive integer.