perfect
//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(); }}