Write a program to accept a number and check whether the number is a Perfect Number or not
Explanation :
A perfect Number is a number such that the sum of its divisors(excluding the number itself) equals the number itself .
Example : 28
It's divisors are : 1 , 2 , 4 , 7 , 14 (28 won't be considered)
Sum : 28
Hence , the sum of divisors equals 28 . It's a perfect number .
import java.util.*;
class perfectNum
{
public static void main(String args[])
{
Scanner sc=new Scanner(System.in);
System.out.println("Enter a number");
int num=sc.nextInt();
int temp = num ;
int sum=0;
for(int i=1;i< num;i++)
{
if(num%i==0)
sum=sum+i;
}
if(sum==temp)
System.out.println(temp+" is a perfect number");
else
System.out.println(temp+" is not a perfect number");
}
}
Codely Prompt ----->java perfectNum.java
Enter a number
496
12121 is a perfect number
