Write a Java program to check that a given number is DISARIUM number or not.
DISARIUM number
A number will be called DISARIUM if sum of its digits powered with their respective position is equal to the original number.
PROGRAM :
import java.util.Scanner;
class disarium
{
public static void main(String[] args)
{
Scanner sc=new Scanner(System.in);
System.out.print("\nEnter the number to be checked : ");
int n=sc.nextInt();
int copy = n, d = 0, sum = 0;
String s = Integer.toString(n); //converting the number into a String
int len = s.length(); //finding the length of the number i.e. no.of digits
while(copy>0)
{
d = copy % 10; //extracting the last digit
sum = sum + (int)Math.pow(d,len);
len--;
copy = copy / 10;
}
if(sum == n)
System.out.println(n+" is a Disarium Number.");
else
System.out.println(n+" is not a Disarium Number.");
}
}
/*
Output :
Enter the number to be checked : 135
135 is a Disarium Number.
(Workings 1+3*3+5*5*5 = 1+9+125 = 135
other DISARIUM are 89, 175, 518 etc)
*/