Palindrome or Perfect

// Write a menu driven class to accept a number from the user and check whether it is a Palindrome or a Perfect number.
// (a)Palindrome number – a number is Palindrome which when read in reverse order is same as read in the right order. Example 11, 101, 151 etc.
// (b)Perfect number – a number is called Perfect if it is equal to the sum of its factors other than the number itself. Example 6 = 1 + 2 + 3

//VARIABLE DESCRIPTION:
//CH=CHOICE OF USER
//NUM=USER INPUT FOR NUMBER
//RUN=INITIALISATION TO CHECK WHETHER FIRST OR SECOND TIME RUNNING IN THAT FUNCTION
//REV=STORES REVERSE CHARACTERS ONE BY ONE
//NUM1=STORES BACKUP FOR FIRST INPUT(NUM)
//D=SPLITS EACH CHARACTER ONE BY ONE
//I=STORES FACTORS
import java.io.*;
class PALINDROME_OR_PERFECT
{
    private static int run;
    private static int num;
    private static int ch;
    public static void main(String args[])throws IOException
    {
         InputStreamReader reader=new InputStreamReader(System.in);
         BufferedReader input=new BufferedReader(reader);
         System.out.println("ENTER YOUR CHOICE :");
         System.out.println("1 FOR PALINDROME ");
         System.out.println("2 FOR PERFECT NUMBER ");
         ch=Integer.parseInt(input.readLine());
         if(ch==1)
         {
                 System.out.println("ENTER A NUMBER FOR FINDING WHETHER IT IS A PALINDROME");
                 num=Integer.parseInt(input.readLine());
                 int d;
                int rev=0;
                int num1=num;
                do
                {
                    d=num%10;
                    rev=(rev*10)+d;
                    num=num/10;
                }while(num!=0);
                if(num1==rev)
                System.out.println("IT IS A PALINDROME");
                else
                System.out.println("IT IS NOT A PALINDROME");
          }
          else if(ch==2)
          {
               System.out.println("ENTER A NUMBER FOR FINDING WHETHER IT IS A PERFECT NUMBER");
               num=Integer.parseInt(input.readLine());
               int i=1;
               int sum=0;
               while(i<num)
               {
                    if(num%i==0)
                    sum=sum+i;
                    i++;
               }
               if(sum==num)
               System.out.println("IT IS A PERFECT NUMBER");
               else
               System.out.println("IT IS NOT A PERFECT NUMBER");
          }
              else
              System.out.println("ENTERED WRONG DATA");
      }
     
}

                
                    OUTPUT 1:
ENTER YOUR CHOICE :

1 FOR PALINDROME

2 FOR PERFECT NUMBER

1
ENTER A NUMBER FOR FINDING WHETHER IT IS A PALINDROME

33
IT IS A PALINDROME


                    OUTPUT 2:
ENTER YOUR CHOICE :

1 FOR PALINDROME

2 FOR PERFECT NUMBER

1
ENTER A NUMBER FOR FINDING WHETHER IT IS A PALINDROME

67
IT IS NOT A PALINDROME


                    OUTPUT 3:
ENTER YOUR CHOICE :

1 FOR PALINDROME

2 FOR PERFECT NUMBER

2
ENTER A NUMBER FOR FINDING WHETHER IT IS A PERFECT NUMBER

6
IT IS A PERFECT NUMBER


                    OUTPUT 4:
ENTER YOUR CHOICE :

1 FOR PALINDROME

2 FOR PERFECT NUMBER

2
ENTER A NUMBER FOR FINDING WHETHER IT IS A PERFECT NUMBER

3
IT IS NOT A PERFECT NUMBER


                    OUTPUT 5:
ENTER YOUR CHOICE :

1 FOR PALINDROME

2 FOR PERFECT NUMBER

6
ENTERED WRONG DATA