if (exists $USER{coffee} && $USER{coffee} > 5){$msg='You drink too much coffee'}

##</code><code>##

if ($USER{coffee} && $USER{coffee} > 5){$msg='You drink too much coffee'}

##</code><code>##

if (! exists $USER{coffee}){
    $msg = 'You drank no coffee?!?!';
}
elsif ($USER{coffee} > 5){
    $msg='You drink too much coffee';
}
else {
    $msg='You drank a moderate amount of coffee';
}