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    IsNan

    Check whether value is Not a Number.

    Declaration

    Source position: math.pp line 324

    function IsNan(const d: Single) : Boolean;  overload; overload;

    function IsNan(const d: Double) : Boolean;  overload; overload;

    function IsNan(const d: Extended) : Boolean;  overload; overload;

    Description

    IsNan returns True if the double d contains Not A Number (a value which cannot be represented correctly in double format).

    See also

    Name Description
    IsZero Check whether value is zero.
    IsInfinite Check whether value is infinite.