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Java Programs - Solved 2024 ICSE Computer Science Specimen Paper

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Solved 2024 ICSE Computer Science Specimen Paper

Class 10 - ICSE Computer Science Solved Specimen Papers

Duck Number Program - ICSE 2024 Computer Science Specimen Paper

Question 7

Define a class to accept a 3-digit number and check whether it is a duck number or not.

Note: A number is a duck number if it has zero in it.

 

Example 1:


INPUT: 2083
OUTPUT: Invalid

Example 2:


INPUT: 103
OUTPUT: Duck number

Java 

import java.util.Scanner;
class Duck{
    public static void main(String[] args){
        Scanner in = new Scanner(System.in);
        System.out.print("Enter the number: ");
        int n = Integer.parseInt(in.nextLine());
        if(n < 100 || n > 999){
            System.out.println("Invalid");
            return;
        }
        boolean isDuck = false;
        if(n == 0)
            isDuck = true;
        while(n != 0){
            int digit = n % 10;
            if(digit == 0){
                isDuck = true;
                break;
            }
            n /= 10;
        }
        if(isDuck)
            System.out.println("Duck number");
        else
            System.out.println("Not a duck number");
    }
}

Output

 
 OUTPUT 1: 
Enter the number: 2083
Invalid
 
 OUTPUT 2: 
Enter the number: 103
Duck number
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