Question

Your code should contain appropriate validations and must focus on code optimization. Briefly, explain (150-200 words) the logic of the program and how the code can be   optimized.

Modify the code to repeat the program until the user enters “no”.

(*I need the logical write out on how the program behaves when there is an input from the user. (I don't need the //comments).

import java.util.Scanner;

public class Q2

{

    public static void main(String[] args)

    {

        Scanner kb = new Scanner(System.in);

        int studentNo, score;

        String Yes;

        do

        {

            System.out.println("Enter Your ID Number : ");

            studentNo = kb.nextInt();

            System.out.println("Enter Your Marks : ");

            score = kb.nextInt();

            if (score >= 85 && score <= 100)

            {

                System.out.println("Your Grade is HD");

            }

            else if (score >= 75 && score <= 84)

            {

                System.out.println("Your Grade is D");

            }

            else if (score >= 65 && score <= 74)

            {

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

            }

            else if (score >= 50 && score <= 64)

            {

                System.out.println("Your Grade is P");

            }

            else if (score >=0 && score <50)

            {

                System.out.println("Your Grade is F");

            }

            else

            {

                    System.out.println("Invalid Marks");

                    }

            System.out.println("Do You want to continue (Yes/No): ");

            Yes = kb.next();           

        }

        while(Yes.equalsIgnoreCase("Yes"));

       

    }

   

}

Answer 1

`Hey,

Note: Brother in case of any queries, just comment in box I would be very happy to assist all your queries

The program basically repeats itself until user enters anything other than yes. In that loop it asks user for ID of student and its marks. Then it checks in which range does the marks fall. Marks should be in range 0 and 100 if anything other is entered it outputs invalid marks. If the marks are in range then it outputs the corresponding grade. then in the loop it asks user if he wants to continue (yes/no) and checks if user entered something other then yes case insensitive then it breaks.

import java.util.Scanner;

public class Q2

{

    public static void main(String[] args)

    {

        Scanner kb = new Scanner(System.in);

        int studentNo, score;

        String Yes;

        do

        {

            System.out.println("Enter Your ID Number : ");

            studentNo = kb.nextInt();

            System.out.println("Enter Your Marks : ");

            score = kb.nextInt();

            if (score >= 85 && score <= 100)

            {

                System.out.println("Your Grade is HD");

            }

            else if (score >= 75 && score <= 84)

            {

                System.out.println("Your Grade is D");

            }

            else if (score >= 65 && score <= 74)

            {

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

            }

            else if (score >= 50 && score <= 64)

            {

                System.out.println("Your Grade is P");

            }

            else if (score >=0 && score <50)

            {

                System.out.println("Your Grade is F");

            }

            else

            {

                    System.out.println("Invalid Marks");

                    }

            System.out.println("Do You want to continue (Yes/No): ");

            Yes = kb.next();           

        }

        while(!Yes.equalsIgnoreCase("No"));

       

    }

   

}

Kindly revert for any queries

Thanks.