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.
1 If you just want to print a double value, with n digits after the decimal point, you can use something like. double dVal = 290.1234; System.out.printf (Value with 4 digits after decimal point %.4f, dVal);  You can use Math.round to round your double value to nearest integers as : Math.round (dVal * 10000.0) / 10000.0; To make your value round to n decimal places you could multiply by [math]10^n[/math], and then divide by [math]10^n[/math].