#include <stdio.h>

int main() 
{
    int a,b;
    printf("enter an number");
    scanf("%d",&a);
    for (b=2; b<10;b++)
        {
            if (a%b==0 && a!=2)
            {
                printf("\nno, it's not a prime number");
                break;
            }
            else
            {
                printf("\nyes, it's a prime number");
                break;
            }
        }
    

    return 0;
}