While loop and if - execute only one time

I have following code:

while($row = mysql_fetch_assoc($result))
{
    if(strtolower($message) == $row['question'])
    {
        msg($row['answer']);
        update($row['question']);
    } else {
        dodaj(strtolower($message), '', 0);
    }
}

and I would like to execute function dodaj(); only one time, not a few times. How to do it? Please help, thank you very much. Greetings.