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Java Programming Exercies

Java Exercises: Find all the narcissistic numbers between 1 and 1000

Java Numbers: Exercise-23 with Solution

Write a Java program to find all the narcissistic numbers between 1 and 1000.

In number theory, a narcissistic number is a number that is the sum of its own digits each raised to the power of the number of digits.
For example:
153 = 13 + 53 + 33

Pictorial Presentation:

Java: Find all the narcissistic numbers between 1 and 1000.

Sample Solution:

Java Code:

import java.util.LinkedList;
public class Example23  {

    public static void main(String args[])
    {
        for (int i = 1; i < 1000; i++) {
            int n = i;
            LinkedList<Integer> data = new LinkedList<>();
            while (n > 0) {
                data.push( n % 10 );
                n = n / 10;
            }
            int n1 = 0;
            for(Integer num : data) {
                n1 += Math.pow(num, data.size());
            }
            if(i == n1) {
                System.out.println(i);
            }
        }
    }
}

Sample Output:

1                                                                                                 
2                                                                                                 
3                                                                                                 
4                                                                                                 
5                                                                                                 
6                                                                                                 
7                                                                                                 
8                                                                                                 
9                                                                                                 
153                                                                                                 
370                                                                                                 
371                                                                                                 
407 

Flowchart:

Flowchart: Find all the narcissistic numbers between 1 and 1000

Java Code Editor:

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Previous: Write a program to check if a number is Mersenne number or not.
Next: Write a Java program to check if a number is palindrome or not.

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