ICSE Class 10 Computer Applications
Question 31 of 69
Iterative Constructs in Java — Question 31
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Question Question 27
Write a menu driven program to accept a number from the user and check whether it is a BUZZ number or to accept any two numbers and to print the GCD of them.
- A BUZZ number is the number which either ends with 7 or is divisible by 7.
- GCD (Greatest Common Divisor) of two integers is calculated by continued division method. Divide the larger number by the smaller; the remainder then divides the previous divisor. The process is repeated till the remainder is zero. The divisor then results the GCD.
import java.util.Scanner;
public class KboatBuzzGCD
{
public static void main(String args[]) {
Scanner in = new Scanner(System.in);
System.out.println("1. Buzz number");
System.out.println("2. Calculate GCD");
System.out.print("Enter your choice: ");
int choice = in.nextInt();
switch (choice) {
case 1:
System.out.print("Enter a number: ");
int num = in.nextInt();
if (num % 10 == 7 || num % 7 == 0)
System.out.println(num + " is a Buzz Number");
else
System.out.println(num + " is not a Buzz Number");
break;
case 2:
System.out.print("Enter first number: ");
int a = in.nextInt();
System.out.print("Enter second number: ");
int b = in.nextInt();
while (b != 0) {
int t = b;
b = a % b;
a = t;
}
System.out.println("GCD = " + a);
break;
default:
System.out.println("Incorrect Choice");
break;
}
}
}Output
