Prime

#include <iostream>
using namespace std;


int isPrime(int num)
{
    int div = 2;
    while(div < num)
    {
        if((num%div)==0)
        {
            return -1;
        }
        else
            div++;
    }
    return 0;
}

int main() {
    int number;
    cout << "Please enter number"<<endl;;
    cin >> number;
    if(isPrime(number))
        cout<<"The number "<< number<<" is not prime"<< endl;
    else
        cout<<"The number "<< number<<" is prime"<< endl;
    return 0;
}