How to use echo along with shorthand IF, ELSEIF and ELSE

Hi,

I saw somebody else asked this before but the answers there are not what I am looking for. I would like to know what is the shorthand for expressions like this example:

if ($gender == 'male'){
    echo 'M;
} else if($gender == 'female'){
    echo 'F';
} else {
    echo 'undefined';
}

I only know what to do when there is only 2 possibilities:

echo ($gender == 'male' ? 'M' : 'F');

but what about when you have else if like in my example above?

Thank you.