Mark.java

import java.util.Scanner;

public class Mark {
    public static void main(String args[]){
        Scanner sc = new Scanner(System.in);
         int choice;
         int mark;
        do{
            System.out.println("Enter 1 to input Student marks, 0 to stop");
            choice= sc.nextInt();

            if (choice==1) {          
            do{
                System.out.println("Enter the mark (0-100): ");
                mark = sc.nextInt();
                if (0 <= mark && mark <= 100 ) {
                     if ( mark >= 90) {
                        System.out.println("This is good");
                    }
                    else if(mark <= 89 && mark >=60)
                    {
                        System.out.println("This is also good");
                    }
                    else
                    {
                        System.out.println("This is good as well  ");
                        System.out.println(" Because mark does not matter but our efforts does.");
                    }
                 
                }
                else
                {
                    System.out.println("Invalid mark. Please enter a value between 1-100.");
                }
            choice = sc.nextInt();
            }while (choice==1);
        }    
            
            else if (choice==0) {
                System.out.println("Exit");
            } 
            else{
                System.out.println("Invalid choice. Please enter a value 0 or 1.");
            } 
        }while(choice != 0);
       sc.close();
    }
    
}