Fact

Determines the factorial of a number.

Fact ( n )

Argument	Description
n	The number for which you want the factorial

Double. Returns the factorial of n. If n is null, Fact returns null.

This statement returns 24 (that is, 1 * 2 * 3 * 4):

Fact(4)

Both these statements return 1:

Fact(1)

Fact(0)