Dudeney Number in Java

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What is a Dudeney Number?

A dudeney number is a positive integer such that it's cube root equals its sum of digits.

Some examples of Dudeney Numbers

Consider the number 512.
Sum of digits = 5 + 1 + 2 = 8.
Cube root of 512 = 8.
So, 512 is a dudeney number.

Consider another number 4913.
Sum of digits = 4 + 9 + 1 + 3 = 17.
Cube root of 4913 = 17.
So, 4913 is also a dudeney number.

Dudeney Number Program in Java

import java.util.Scanner;
class Dudeney{
    public static void main(String args[]){
        Scanner in = new Scanner(System.in);
        System.out.print("Enter the number: ");
        int num = Integer.parseInt(in.nextLine());
        int sum = 0;
        for(int i = num; i != 0; i /= 10)
            sum += i % 10;
        double c = Math.cbrt(num);
        if(sum == c)
            System.out.println(num + " is a dudeney number");
        else
            System.out.println(num + " is not a dudeney number");
    }
}
Location: Asansol, West Bengal, India

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