Full Definition of DRAGONFLY. : any of a suborder (Anisoptera) of odonate insects that are larger and stouter than damselflies, hold the wings horizontal in repose, and have rectal gills during the naiad stage; broadly: odonate.See dragonfly defined for English-language learners.See dragonfly defined for kids. any of a suborder (Anisoptera) of odonate insects that are larger and stouter than damselflies, hold the wings horizontal in repose, and have rectal gills during the naiad stage; broadly: odonate. See dragonfly defined for English-language learners. See dragonfly defined for kids.
The value of this constant is positive 1.7976931348623157E+308. The result of an operation that exceeds Double.MaxValue is Double.PositiveInfinity. In the following example, Double.PositiveInfinity results from addition, multiplication, and exponentiation operations when the result exceeds Double.MaxValue.
In the above, 1  The main method calls getANumber() to get a double value, and assigns this value to number1. 2  The main method calls getANumber() a second time to get another double value, and assigns this value to number2. 3  The main method calls average(number1, number2) to compute the average of the two numbers.