Display the field
Like any other Joomla! field, the country field supports
getInput() methods. You may call them and output their result wherever you wish in your template files. Assuming that country is the name of the field in your XML form:
Once the form is submitted, the value you get for a country field corresponds to the ISO 3166-1 alpha-2 code of the selected country. For example, if Russia is selected, you get the value
See the JFormField documentation for more details about form fields in Joomla!.