Where is the search button

I was wondering how can I edit the default search button in the wordpress theme. I searched for an answer, but didn’t find a good one. All I wanted to do was to remove the ‘search for’ label near the search bar.  Ha! I couldn’t find that piece of code. Finally I did a search through an original wordpress download. There I found my answer in wp-includes/general-template.php on line 125.  I changed the <label for=”s”>’ . __(‘Search for :‘) . ‘</label> into <label for=”s”>’ . __(”) . ‘</label>

Thought I should share this with everyone, since this might be helpful for many like me, who are not graduated in WordPress.