factorial(x)

Overview

The factorial function computes the factorial of a given non-negative integer $n$. The factorial, denoted $n!$, is the product of all positive integers less than or equal to $n$. For example, $5! = 5 * 4 * 3 * 2 * 1 = 120$.

Parameters

Parameter Name	Type	Description	Required	Default Value
x	number	The non-negative integer for which the factorial will be calculated.	Yes	N/A

Returns

Type	Description	Possible Values
number	The factorial of the input number $x$.	Any non-negative integer

Constraints

• The x parameter must be a non-negative integer.
• Factorial of negative integers is undefined, so such input should be avoided.

Example Use

local number = 5

-- The factorial of 5 is 5 * 4 * 3 * 2 * 1 = 120
local result = StatBook.factorial(number)

print(result)