Question

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

Answer 1

import java.util.Scanner;
class DuckNumber
{
    public static void main(String args[])
    {
       Scanner sc=new Scanner(System.in);
       System.out.println("Enter a 3-digit number");
       int n=sc.nextInt();
       if(n>=100 && n<=999)//checking for 3-digit number
       {
         int m=n;//temporary storage for the loop
         int p=1;
         while(m>0)
       {
            int r=m%10;//extracting each digit from the number
            p*=r; //multiplying the digits
            m=m/10;//storing the remaining number
       }
       if(p==0)
            System.out.println("Duck number");
       else
            System.out.println("Not a duck number");
       }
       else
            System.out.println("Invalid number");
    }
}