isNaN property

bool get isNaN

Whether this number is a Not-a-Number value.

Is true if this number is the double.nan value or any other of the possible double NaN values. Is false if this number is an integer, a finite double or an infinite double (double.infinity or double.negativeInfinity).

All numbers satisfy exactly one of isInfinite, isFinite and isNaN.

Implementation

bool get isNaN;