cppProductFrom1to20

#include <iostream>

int main()
{
    const int maxRange{ 20 };
    const int minRange{ 1 };
    int num;
    bool correct{ false };

    uint64_t product{ 1 };

    do
    {
        std::cout << "Enter number from " << minRange << " to  " << maxRange << '\n';
        std::cin >> num;
        correct = (num >= minRange) and (num <= maxRange);

        if (!correct)
        {
            std::cout << "Not in range! Try again!";
        }
    } while (!correct);

    for (; num <= maxRange; product *= num++);
    std::cout << "Product is: " << product << '\n';

    return 0;
}