geo module usage

[Sean Allen]

want to make sure i understand this:

         geo  $country  {
             default          no;
             include          conf/geo.conf;
             127.0.0.0/24     us;
             127.0.0.1/32     ru;
             10.1.0.0/16      ru;
             192.168.1.0/24   uk;
         }


set the variable country based on the mapping... so if the ip address  
was 192.168.1.10 then $country would be 'uk'

and i could do something like:

if ( $country  = 'uk' )
{
     something here
}

or

if ( $country ~* ^u )
{
     something for every country that starts with a u
}

correct?

am i getting all that right?