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Java Program to Check the Number is Perfect or not ?

Here we are going to write a program to check a number is Perfect or not ?

Number is Perfect or not ?

import java.util.Scanner;

public class IsPerfectNumber {

    public static void main(String a[]) {

        int tempValue = 0;
        Scanner s1 = new Scanner(;
        System.out.println("Enter a Number");
        int inputValue = s1.nextInt();

        for (int count = 1; count <= inputValue / 2; count++) {
            if (inputValue % count == 0) {
                tempValue = tempValue + count;

        if (tempValue == inputValue) {
            System.out.println("Given Number is a perfect number");
        } else {
            System.out.println("Given Number is Not a perfect number");


Output :

Enter a Number 28
Given Number is a perfect number

Enter a Number 20
Given Number is Not a perfect number

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