Write a program to calculate average of three subject marks and print the grade.

public class Avg

 {

    public static void main(String args[])

     {

                 int avg=0;

                 int mrk1=Integer.parseInt(args[0]);

                 int mrk2=Integer.parseInt(args[1]);

                 int mrk3=Integer.parseInt(args[2]);

                 avg=(mrk1+mrk2+mrk3)/3;

                 System.out.println("the avg of marks are ="+avg);

        if(avg>=90)

                   System.out.println("grade of the student is AA");        

         if(avg>=80)                    

                         System.out.println("grade of the student is AB");  

         if(avg>=70)

                     System.out.println("grade of the student is BB");                  

         if(avg>=60)

                  System.out.println("grade of the student is BC");

         if(avg>=50)

                  System.out.println("grade of the student is CC") ;

         if(avg>=40)

                       System.out.println("grade of the student is CD");                            

         if(avg>=30)

                  System.out.println("grade of the student is DD");         

         if(avg<=29)

                  System.out.println("grade of the student is fail");        

            } 

                       

}