check given number is prime number or not using c program

#include<stdio.h>

int main(){

    int num,i,count=0;

    printf("\nEnter a number:");

    scanf("%d",&num);

    for(i=2;i<=num/2;i++){

        if(num%i==0){

         count++;

            break;

        }

    }

   if(count==0)

        printf("%d is a prime number",num);

   else

      printf("%d is not a prime number",num);

   return 0;

}