Armstrong or not

 import java.util.Scanner;

class Main {

    public static void main(String[] args) {

Scanner sc=new Scanner(System.in);

int num=sc.nextInt();

int ornum=num;

int sum=0;

while(num>0){

    int digit=num%10;

    //int sum=0;

    sum= sum + (digit * digit * digit);

    num=num/10;

}if(ornum==sum){

System.out.println("Is a armstrong");

    }

    else{

        System.out.println("Is a not armstrong");

    }

}

}