#include <stdio.h>
int main()
{
    int a;
    int flag=0;
    printf("enter the number: \n");
    scanf("%d",&a);
    
    for(int i=2;i<=a/2;i++)
        {
            if(a%i==0){
                printf("it is not a prime number");
                flag=1;
                break;
            }
        }
    if(flag==0){
        printf("it is a prime number");
    }
    return 0;
}