// In this week's episode of "YOUR DOING IT WRONG"

void Main()
{

    // The ** OLD ** keyword-heavy way to write a for loop.... nobody does this any more...
    for (int i = 0; i < 12; i++)
    {
        Console.WriteLine(i);
    }

    // WHY memorise all that custom syntax, that *only* applies to `for` statements.

    // MUCH better to have general principles that are used everywhere and just use those.

    //The NEW way to write a for loop... uses the proprietary fforr function... no keywords!
    fforr(() => 0, i => i < 12, i => ++i, (i) =>
    {
        Console.WriteLine(i);
    });
}

public void fforr(Func<int> iCreator, Predicate<int> test, Func<int, int> incrementi, Action<int> doAction)
{
    var i = iCreator();
    while (test(i))
    {
        doAction(i);
        i = incrementi(i);
    }
}