Double.isNaN

Returns {@code true} if this {@code Double} value is a Not-a-Number (NaN), {@code false} otherwise.

@return {@code true} if the value represented by this object is NaN; {@code false} otherwise.

  1. bool isNaN()
    class Double
    @trusted nothrow
    bool
    isNaN
    ()
  2. bool isNaN(double v)

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