Question

Using switch statement, write a menu driven program for the following:
i) To find the sum of the series given below:
a- ....
+
ii) To display the series.
1, 11, 111, 1111, 11111

Answer 1

Answer:

Using switch statement, write a menu driven program for the following:

(a) To find and display the sum of the series given below:

S = x1 - x2 + x3 - x4 + x5 - ………… - x20; where x = 2

(b) To display the series:

1, 11, 111, 1111, 11111

Answer 2

Answer:

scroll down

Explanation:

import java.util.Scanner;

public class menudriven

{

   public static void main() {

       Scanner in = new Scanner(System.in);

       System.out.println("1. Sum of the series");

       System.out.println("2. Display series");

       System.out.print("Enter your choice: ");

       int choice = in.nextInt();

       switch (choice) {

           case 1:

           int sum = 0;

           for (int i = 1; i <= 20; i++) {

               int term = (int)Math.pow(2, i);

               if (i % 2 == 0)

                   sum -= term;

               else

                   sum += term;

           }

           System.out.println("Sum=" + sum);

           break;

           

           case 2:

           int term = 1;

           for (int i = 1; i <= 5; i++) {

               System.out.print(term + " ");

               term = term * 10 + 1;

           }

           break;

           

           default:

           System.out.println("Incorrect Choice");

           break;

       }

   }

}