What is the menaing of print t(); in following code? I was referring the html.tpl.php to learn the theming guide for drupal 7, and found following code line in html.tpl.php,

&lt;a href="&lt;?php print $skip_link_target; ?&gt;" class="element-invisible element-focusable"&gt;&lt;?php print t('Skip to main content'); ?&gt;&lt;/a&gt; 


Can anybody let me know what is the print t() in &lt;?php print t('Skip to main content'); ?&gt;. 
Is it translation function or something else?
Yes, it's Drupal's string translation function.

t()


  Translates a string to the current language or to a given language.