Program in Java to find whether a number is perfect or not

Perfect Number-  If the sum of all the factors of a number is equal to the number itself then it is a perfect number. This program finds whether a given number is perfect number or not.

Example:- 6 = 1+2+3

28 = 1+2+4+7+14

import java.io.*;

class perfectnumber

{

public static void main()throws IOException

{

int n,s=0;

InputStreamReader IR=new InputStreamReader(System.in);

BufferedReader br=new BufferedReader(IR);

System.out.println("entre a no");

n=Integer.parseInt(br.readLine());

 

for(int x=1;x<n;x++)

if(n%x==0)

s=s+x;

if(s==n)

System.out.println("it is perfect no");

else

System.out.println("it is not perfect no");

}

}