Sum of Non-Prime Number

We are taking a number N as a input which and we have to find the sum of all non prime numbers in digits of N i.e. if N=789 then 8 and 9 are not prime so print 8+9.

Example:

Input

579

Output

9

Input

467

Output

10

Solution :- https://onlinegdb.com/4wofh-j8y

import java.util.*;
public class Main
{

static int countDigit (long n)
  {
    int count = 0;
    while (n != 0)
      {
 n = n / 10;
 ++count;
      }
    return count;
  }

public static int prime (int n)
  {

if (n == 1 || n == 0)
      return 0;

else if (n == 2)
      return 0;

else if (n % 2 == 0)
      return n;

for (int i = 3; i <= Math.sqrt (n); i += 2)
      {
 if (n % i == 0)
   return n;
      }
    return 0;
  }

public static void main (String[]args)
  {
    int sum = 0;
    int arr[] = new int[100];
    Scanner sc = new Scanner (System.in);
    int n = sc.nextInt ();
    int size = countDigit (n);
    for (int i = 0; i < size; i++)
      {
 if (n > 0)
   {
     arr[i] = n % 10;
     n = n / 10;
   }
      }
    for (int i = 0; i < size; i++)
      {
 sum += prime (arr[i]);
      }
    System.out.println (sum);
  }
}