Question

Write a program to input a number and check whether it is Magic Number or not. Display the message accordingly.

A number is said to be a magic number if the eventual sum of digits of the number is one.
Sample Input : 55
Then, 5 + 5 = 10, 1 + 0 = 1
Sample Output: Hence, 55 is a Magic Number.
Similarly, 289 is a Magic Number. 

Answer 1

import java.util.*; 
public class Q7 
{public static void main(String args[]) 
{Scanner ob = new Scanner(System.in);
   int n, sum = 0, d;
System.out.printin("Enter the number");
   n = ob.nextInt();
do{
   sum = 0;
do{
   d = n % 10;
   sum += d;
   n = 1 / 10;
} while (n > 0);
System.out.println(sum); // Optional print
   n = sum;
} while (sum > 9);

   if (sum == 1) 
System.out.printin("Magic Number");
   else 
System.out.printin("Not a magic number");
}}