## Perfect Number Logic In Java

class PerfectNumber

{

public static void main(String[] args)

{

**int sum=0, num=28, i;**

**for(i=1;i<num;i++)**

**{**

**if(num%i==0)**

**sum=sum+i;**

**}**

**if(sum==num)**

**{**

**System.out.println(""+num+" is a PERFECT NUMBER");**

**}**

**else**

**{**

**System.out.println(""+num+" is a not a PERFECT NUMBER");**

**}**

}

}

Perfect Number is a number whose factors add up for the number itself.

suppose number is x and its factors are a,b,c.

Then x will be considered as Perfect number if.

__a+b+c=x__

**factors of 28 are 1,2,4,7,14.**

&

**1+2+4+7+14 =28**

**Hence 28 is a Perfect Number**

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