Return sign of argument.
Source position: math.pp line 255
| function Sign( | 
| const AValue: Integer | 
| ):TValueSign; overload; | 
| const AValue: Int64 | 
| ):TValueSign; overload; | 
| const AValue: Single | 
| ):TValueSign; overload; | 
| const AValue: Double | 
| ):TValueSign; overload; | 
| const AValue: Extended | 
| ):TValueSign; overload; | 
Sign returns the sign of it's argument, which can be an Integer, 64 bit integer, or a double. The returned value is an integer which is -1, 0 or 1, and can be used to do further calculations with.