//Java program to check whether a number is perfect or not import java.util.Scanner;public class perfect_number_or_not{        public static void main(String[] args)    {        //scanner class declaration        Scanner sc = new Scanner(System.in);        //input from user        System.out.print("Enter a number : ");                        int number = sc.nextInt();        //declare a variable to store sum of factors        int sum = 0;        for(int i = 1 ; i < number ; i++)        {            if(number % i == 0)                sum = sum + i;        }        //comparing whether the sum is equal to the given number or not        if(sum == number)            System.out.println("Perfect Number");        else            System.out.println("Not an Perfect Number");        //closing scanner class(not compulsory, but good practice)        sc.close();                                                        }}