This is a complete if-example:

    if ((condition1) || (condition2)) {
        action1;
    } elseif ((condition3) && (condition4)) {
        action2;
    } else {
        defaultaction;
    }
      

For switch statements:

    switch (condition) {
    case 1:
        action1;
        break;
    case 2:
        action2;
        break;
    default:
        defaultaction;
        break;
    }