Factorial (Function)

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Calculates the factorial of a number, Num, by multiplying all positive integers less than or equal to Num.

Syntax

Factorial(Num)

Parameters

Name

Type

Description

Num

Numeric

The base number from which to calculate the factorial.

Returns (Double)

The Factorial of the specified number. Returns an error value of -1 if Num is a negative number.

Usage

The factorial of a number is equal to 1*2*3*...* number. The number needs to be positive, and if it has a decimal value it will be truncated.

Example

In the following expression, Value1 will be equal to 24 (1*2*3*4=24):

Value1 = Factorial(4);