How to use prime number is not prime in c language

#include <stdio.h>
#include <math.h>
int main()
{
  int i, n;
  printf("Enter a Number : ");
  scanf("%d", &n);
  for (i = 2; i <= sqrt(n); i++)
  {
      if (n % i == 0)
      {
          break;
      }
      printf("i = %d\n", i);
      printf("n = %d\n", n);
  }
  if (i > sqrt(n))
  {
      printf("%d is Prime Number \n", n);
  }
  else
  {
      printf("%d is Not Prime Number \n", n);
  }
  return 0;
}

Enter a Number : 7
i = 2
n = 7
7 is Prime Number

Enter a Number : 4
4 is Not Prime Number