Java tutorial
import java.util.stream.DoubleStream; public class Main { public static void main(String[] args) { DoubleStream b = DoubleStream.of(1.1, 2.2, 3.3, 4.4, 5.5); double d = b.reduce(0, (n1, n2) -> n1 + n2); System.out.println(d); } }