====== IsNum(expression) ======

Returns TRUE if result of //expression// is a number, otherwise returns FALSE.

^  Example  ^  FieldA  ^  Result  ^  
| IsNum( [FieldA] )  |  200  |  TRUE  | 
| IsNum( [FieldA] )  |  It's a number!  |  FALSE   |
| IsNum( [FieldA] )  |   |  FALSE   |