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Check Armstrong or not- Java Program

import java.util.*;
class Check_armstrong{
public static void main(String[] args) {

System.out.println("Enter three digit number to know Armstrong or not");
Scanner sc= new Scanner(System.in);
int number= sc.nextInt();

int number_copy=number;
int sum=0;

while(number!=0)
{
int digit=number%10;
sum= sum+(digit*digit*digit);
number=number/10;
}

if(sum==number_copy)              System.out.println(number_copy+ " is a Armstrong number");
else                                                 System.out.println(number_copy+ " is not an Armstrong number");


}}