Fact - script and chart function

Fact() returns the factorial of a positive integer x.

Syntax:  

Fact(x)

Return data type: integer

Limitations:  

If the number x is not an integer, it will be truncated. Non-positive numbers will return NULL.

Examples and results:  

Examples Results

Fact( 1 )

Returns 1

Fact( 5 )

Returns 120 ( 1 * 2 * 3 * 4 * 5 = 120 )

Fact( -5 )

Returns NULL