angularjs - angular link. What is # and what does it do? -

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i working through ca angular course. had question code:

<div class="main">   <div class="container">      <h2>recent photos</h2>     <div class="row">       <div class="item col-md-4" ng-repeat="photo in photos">         <a href="#/photos/{{$index}}">           <img class="img-responsive" ng-src="{{ photo.url }}">           <p class="author">by {{ photo.author }}</p>         </a>       </div>     </div>    </div> </div>

in

so when click photo, angular knows it's index , index gets relayed photocontroller routeparams right , can access via $routeparams.id. #?

# used in called hash navigation separate section of url's elements. hash navigation used angular interior hash routing rather full page routing.


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