print different text on checkbox check/uncheck with angularjs

I am creating a web app in which i am using toggle button when a user click once on the toggle button 'yes' should be store in a $scope variable if the user click twice 'no' should be stored in a $scope variable

here is my codding for toggle button

<div class="switch">
     <input ng-click="clickcheckbox()" id="cmn-toggle-1" class="cmn-toggle cmn-toggle-round" type="checkbox">
     <label for="cmn-toggle-1"></label>
 </div>

i have taken ng-click because i am not able to do this with ng-checked

here is my controller

$scope.clickcheckbox=function(){
    //if user check the checkbox
    $scope.check='yes';
    //if user uncheck the checkbox
    $scope.check='no';
    }

if there are other better ways to do this(please help me out with them)