Write a program to display grade message according to the marks obtained by the student

import java.util.*;

class StudentGrade

  {

   public static void main(String a[])

     {

       int studentmarks;

       Scanner in=new Scanner(System.in);

       System.out.println("enter the marks of student");

       studentmarks=in.nextInt();

       if((studentmarks>=300)&&(studentmarks<=500))

         {

           System.out.println("Grade A");

         }

       if((studentmarks>=225)&&(studentmarks<=299))

         {

           System.out.println("Grade B");

         }

       if((studentmarks>=165)&&(studentmarks<=224))

         {

           System.out.println("Grade C");

         }

       if(studentmarks<165)

         {

           System.out.println("Fail");

         }

     }

   }