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Check whether a value equals NaN.
Source position: syshelph.inc line 267
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).
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Check whether a value is positive or negative infinity. |
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Check whether a value is positive infinity. |
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Check whether a value is negative infinity. |