ICSE Class 10 Computer Applications
Question 3 of 6
Solved 2017 Question Paper ICSE Class 10 Computer Applications — Question 3
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Question Question 6
Using switch statement, write a menu driven program for the following:
- To find and display the sum of the series given below:
S = x1 - x2 + x3 - x4 + x5 .......... - x20
(where x = 2) - To display the following series:
1 11 111 1111 11111
For an incorrect option, an appropriate error message should be displayed.
import java.util.Scanner;
public class KboatSeriesMenu
{
public static void main(String args[]) {
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 x = 2;
int term = (int)Math.pow(x, 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;
}
}
}
