Question

Write a program to display all prime palindrome numbers between 10 and 1000.

Hint: A number which is prime as well a palindrome is said to be Prime Palindrome number.
For example, 11, 101, 131, 151, ......................... 

Answer 1

public class Q4
{public static void main(String args[])
{ System.out.println("Prime palindrome numbers:");
int n, cnt = 0, sum = 0, d;

for (int i = 10; i <= 1000; i++) 
     {cnt = 0; // reset to zero for every number
     sum = 0; // reset sum for every number
for (int j = 1; j <= i; j++)
     {if (i % j == 0)
cnt++;
     }
     if (cnt == 2)
     { 
     n = i;
     do
     {d = n % 10;
     sum = sum * 10 + d;
     n = 1 / 10;
}while (n > 0);
  
     if (i == sum)
System.out.printIn(i);
}}}}