| [Overview][Constants][Types][Classes][Procedures and functions][Variables][Index] |
Check whether a value equals NaN.
Source position: syshelph.inc line 288
public class function TDoubleHelper.IsNan( |
const AValue: Double |
):Boolean; overload; |
IsNan checks whether a Double-sized floating point value is NaN (Not a Number). If so, it returns True. When the class function version is used, the value can be specified using AValue. In the method version, the used value is (Self).
|
Check whether a value is positive or negative infinity. |
|
|
Check whether a value is positive infinity. |
|
|
Check whether a value is negative infinity. |