Prime test

#include <iostream>
using namespace std;

bool bruteForce(int n)
{
    if (n < 2)
        return false;
    for (int i = 2; i < n; i++)
    {
        if (n % i == 0)
            return false;
    }
    return true;
}

int main()
{
    int n;
    cin >> n;
    cout << "n is " << (bruteForce(n) ? "" : "not a ") << "prime number." << endl;
}