Geo module usage

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?