ICSE Class 9 Computer Applications
Question 18 of 29
Iterative Constructs in Java — Question 21
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Question Question 17
Using the switch statement, write a menu driven program to:
i. Generate and display the first 10 terms of the Fibonacci series 0, 1, 1, 2, 3, 5...
The first two Fibonacci numbers are 0 and 1, and each subsequent number is the sum of the previous two.
ii. Find the sum of the digits of an integer that is input.
Sample Input: 15390
Sample Output: Sum of the digits = 18
For an incorrect choice, an appropriate error message should be displayed.
import java.util.Scanner;
public class KboatFibonacciNDigitSum
{
public static void main(String args[]) {
Scanner in = new Scanner(System.in);
System.out.println("1. Fibonacci Series");
System.out.println("2. Sum of digits");
System.out.print("Enter your choice: ");
int ch = in.nextInt();
switch (ch) {
case 1:
int a = 0, b = 1;
System.out.print(a + " " + b);
/*
* i is starting from 3 below
* instead of 1 because we have
* already printed 2 terms of
* the series. The for loop will
* print the series from third
* term onwards.
*/
for (int i = 3; i <= 10; i++) {
int term = a + b;
System.out.print(" " + term);
a = b;
b = term;
}
break;
case 2:
System.out.print("Enter number: ");
int num = in.nextInt();
int sum = 0;
while (num != 0) {
sum += num % 10;
num /= 10;
}
System.out.println("Sum of Digits " + " = " + sum);
break;
default:
System.out.println("Incorrect choice");
break;
}
}
}Output
