Question

write a java program to check whether the sum of digits raised to their position number is equal to the number
example:3624
if 3^1+6^2+2^3+4^4= 3624

Answer 1

Answer:

public class DisariumNumber  

{  

   //calculateLength() will count the digits present in a number  

   public static int calculateLength(int n){  

       int length = 0;  

       while(n != 0){  

           length = length + 1;  

           n = n/10;  

       }  

       return length;  

   }  

     

   public static void main(String[] args) {  

       int num = 175, sum = 0, rem = 0, n;  

       int len = calculateLength(num);  

         

       //Makes a copy of the original number num  

       n = num;  

         

       //Calculates the sum of digits powered with their respective position  

       while(num > 0){  

           rem = num%10;  

           sum = sum + (int)Math.pow(rem,len);  

           num = num/10;  

           len--;  

       }  

         

       //Checks whether the sum is equal to the number itself  

       if(sum == n)  

           System.out.println(n + " is a disarium number");  

       else  

           System.out.println(n + " is not a disarium number");  

   }  

}  

Explanation: