import java.util.Scanner; /* perfect Number between 1-N */ public class Perfect { public static void main(String[] args) { Scanner in = new Scanner(System.in); System.out.println("Enter the no. - "); long n=in.nextInt(); int i; for(i = 2; i < n; i++) { if(isNumPerfect(i)) { System.out.println(i + " is a perfect number"); } } in.close(); } public static boolean isNumPerfect(int i) { boolean isPerfect = false; int sum = 1; int x; for(x = 2; x <= i / 2; x++) { if(i % x == 0) { sum += x; } } if(sum == i) { isPerfect = true; } return isPerfect; } }