Even - script and chart function
                Even() returns True (-1), if integer_number is an even integer or zero. It returns False (0), if integer_number is an odd integer, and NULL if integer_number is not an integer.
Syntax:
Even(integer_number)
Return data type: Boolean
Examples and results:
| Examples | Results | 
|---|---|
| 
                                 Even( 3 )  | 
                            Returns 0, False | 
| 
                                 Even( 2 * 10 )  | 
                            Returns -1, True | 
| 
                                 Even( 3.14 )  | 
                            Returns NULL |