﻿ Java - Check if a number is Disarium number or unhappy number

# Java: Check whether a given number is a Disarium number or unhappy number

## Java Numbers: Exercise-11 with Solution

Write a Java program to check whether a given number is a Disarium number or an unhappy number.

A Disarium number is a number defined by the following process:
Sum of its digits powered with their respective position is equal to the original number.
For example 175 is a Disarium number:
As 11+32+53 = 135
Some other DISARIUM are 89, 175, 518 etc.
A number will be called Disarium if the sum of its digits powered with their respective position is equal with the number itself. Sample Input: 135.

Test Data
Input a number : 25

Pictorial Presentation:

Sample Solution:

Java Code:

``````import java.util.Scanner;

public class Example11 {

public static void main(String args[])
{
Scanner sc = new Scanner(System.in);
System.out.print("Input a number : ");
int num = sc.nextInt();
int copy = num, d = 0, sum = 0;
String s = Integer.toString(num);
int len = s.length();

while(copy>0)
{
d = copy % 10;
sum = sum + (int)Math.pow(d,len);
len--;
copy = copy / 10;
}

if(sum == num)
System.out.println("Disarium Number.");
else
System.out.println("Not a Disarium Number.");
}
}
```
```

Sample Output:

```Input a number : 25
Not a Disarium Number.
```

Flowchart:

Java Code Editor: