check whether a number is Prime number or not

#include <stdio.h>
int main()
{
    int n,i,c=0;
    scanf("%d", &n);
    for(i=1;i<=n;i++)
         {
         if(n%i==0)
         {
          c++;
         }
        }
         if(c==2)
         {
            printf("Prime number");
         }
        else
        {
            printf("Not a Prime number");
        }
    return 0;
}