Exercise 4-10

 

int main() {

    int i,num,prime;

    i=2;

    prime=1;

    printf("enter a number: ");

    scanf("%d",&num);

    for (i;i<num;i++){

        if (num%i==0){

            prime=0;

            i=num+1;

        }

    }

    if (prime==1)

        printf("your number is a prime number.");

    else

        printf("your number is not a prime number.");

 

    return 0;

}