Question

Write a program to find whether a number is prime palindrome

Answer 1

Answer:

Write a program to find whether a number is prime palindrome

Explanation:

#include <stdio.h>

#include <math.h>  

int main()

{

 long n, t, r = 0, c, d;  

 printf("Enter an integer\n");

 scanf("%ld", &n);

 

 while (1)

 {

   n++;

   t = n;  

   // Calculating reverse of the number  

   while(t)

   {

     r = r*10;

     r = r + t%10;

     t = t/10;

   }  

   // If reverse equals original then it is a palindrome  

   if (r == n)

   {

     d = (int)sqrt(n);  

     /* Checking prime */  

     for (c = 2; c <= d; c++)

     {

       if (n%c == 0)

         break;

     }

     if (c == d+1)

       break;

   }

   r = 0;

 }  

 printf("%ld\n",n);  

 return 0;

}

Output:-

Enter an integer:

101

Enter number is prime palindrome.