Method using return type

class Demo{
    double height;
    double base;
    double area(){
        return 0.5*base*height;
    }
}
public class Main{
    public static void main(String args[]){
        Demo dm = new Demo();
        dm.base = 10.5;
        dm.height = 12.0;
        double res = dm.area();
        System.out.println("The area of a Triangle is: " + res);
    }
}