exiting the search loop

The example below is from the docs.  If I want to exit on the first interation (there could be more than one rec)  Would I use return false?  The docs do not describe what the return does.   function loadAndRunSearch() {     var mySearch = search.load({         id: 'customsearch_my_so_search'     });     mySearch.run().each(function(result) {         var entity = result.getValue({             name: 'entity'         });         var subsidiary = result.getValue(             name: 'subsidiary'         });         return true;     });