#include <stdio.h>

main() {
  int n, i;
  printf("Enter a Number:\n");
  scanf("%d", & n);

  for (i = 2; i <= n / 2; i++) {
    if (n % i == 0) {
      break;
    }
  }

  if (i > n / 2) {
    printf("%d is a prime number", n);

  } else

  {
    printf("%d is not a prime number", n);
  }

}
     
           
Note: Need to be arranged in compiler after copied
   

 OutPut:

Enter a Number: 7 7 is a prime number