Understanding switch + foreach

[Matej Nanut]

Hello,

I don't understand why so many break statements are needed in this construct:

    immutable key = 3;
    switch (key)
    {
        foreach (c; TypeTuple!(1, 2, 3, 4, 5))
        {
            case c: "Found %s!".writefln(c);
                    break;
        }
        break; // Default always gets executed without this break.
        default:
            "Not found %s :(".writefln(key);
            break;
    }

One after each case and another one after the foreach.

Thanks,
Matej