Methods In Java

1. Void method with no return value:

public class Calculator {
    public static void main(String[] args) {
    Calculator casio=new Calculator();
    casio.add();
    }
    public void add(){
        return;
    }
}

Output:

Explanation:

- display() method has void return type

- return; is used just to exit the method

- Since there is no print statement, nothing is displayed.

Output: Nothing is displayed

2. Mark Calculation Program:

public class Student {
    public static void main(String[] args) {
    Student marks=new Student();

    int tot=marks.total(70,90,100,99,98);
    System.out.println(tot);

    int avg=marks.average(tot);
    System.out.println(avg);

      String gra=marks.grade(avg);
    System.out.println(gra);
    }
    public int total(int no1,int no2,int no3,int no4,int no5){
        int result=no1+no2+no3+no4+no5;
        return result;
    }

    public int average(int total){
        int result=total/5;
        return result;
    }
 public String grade(int avg){
        if(avg>=90){
            return "A";
        }
        else if(avg >= 85){
            return "B";
        }
            else if(avg >= 80){
            return "C";
        }
            else if(avg >= 70){
            return "D";
        }
            else if(avg >= 60){
            return "E";
        }
            else{
            return "F";
        }
    }

}

Output: