Program to check whether a number is Deficient number, Perfect number or Abundant number

PROGRAM

Suppose you take a positive integer n and add its (positive) divisors. E.g.  if n=18, then sum=1+2+3+6+9+18=39. In general, when we do this with n, one of the following three happens:

If the sum is	n is said to be	e.g.
Less than 2n	Deficient number	1,2,3,4,5,8,9
Equal to 2n	Perfect number	6,28,496
Greater than 2n	Abundant number	12,18,20,24,30

WAP that inputs a number and determines whether it is a Deficient number or a Perfect number or a Abundant number.

SAMPLE DATA

Enter a no: 28                                    It is a Perfect number

Enter a no: 30                                    It is an Abundant number

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/**

 * class checknumber checks whether a number is Deficient number,

 * Perfect number or Abundant number.

 * @author: Nitendra Kumar 

 * @version: June 5,2013

 */

import java.util.Scanner;

public class checknumber

{

    public int num=0;

    public void getnum()  //method to accept a number from user

    {

        Scanner in=new Scanner(System.in);  //creting an object of Scanner class

        System.out.println("Enter a number");

        num=in.nextInt();

    }

    public void fnchecknumber()  //method to check type of number

    {

        int sum=0,dnum=0;

        for(int i=1;i<=num;i++)  

        {

            if(num%i==0)

              sum+=i;

        }

        dnum=2*num;

        if(sum<dnum)

          System.out.println("It is a Deficient number");

        else if(sum==dnum)  

          System.out.println("It is a Perfect number");

        else if(sum>dnum)

          System.out.println("It is an Abundant number");

    }

    

    public static void main()   //Entry point of program

    {

        checknumber ob=new checknumber();  //creating object of class checknumber

        ob.getnum();                       //calling method

        ob.fnchecknumber();          //calling method

    }

}

OUTPUT:

Enter a number

30

It is an Abundant number

/*---------------Program developed by: Nitendra Kumar---------------*/

//For more details visit http://javawithnitendra.blogspot.in


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