PROGRAM 3 : PRIME PALINDROME - ENTER LOWER LIMIT AND UPPER LIMIT AND FIND ALL PRIME PALINDROME NUMBERS IN THAT PARTICULAR RANGE.

(Prime palindrome is number which is prime as well as palindrome in nature.
 Example : 11 , 111 )

PROGRAM:

import java.util.Scanner;
public class primepalindrome
{
    public static void main(String args[])
    { Scanner sc = new Scanner(System.in);
      System.out.println("Enter the upper and lower limit:");
      int x = sc.nextInt();
      int y = sc.nextInt();
      int i;
      System.out.println("All prime palindrome numbers:");
      for(i=x ; i<=y ; i++)
      {
          if(isprime(i)== true)
          {  if(ispalin(i)== true)
                 System.out.println(i);
                }
            }
        }
    public static boolean isprime(int i)
    {   int f = 0;
        for(int j = 2 ; j<i ; j++)
        {
            if(i%j==0)
               f++;
            }
        if(f==0)
           return(true);
        else
           return(false);
        }
    public static boolean ispalin(int i)
    {
        int dig;
        int ans = 0;
        int num = i;
        while(num>0)
        {
            dig = num%10;
            ans+= (ans*10)+dig;
            num = num/10;
        }
        if(num==i)
           return(true);
           else
              return (false);
        }
    }