AngularJS Example

HTML

<div ng-app="App">
  <form name="myForm" ng-controller="Ctrl"> 
      
      <input type="checkbox" ng-model="testc" ng-true-value="Yes" ng-false-value="No" ng-change="processtest()" /> Yes	<br />
      
      {{testc}}
   </form>
</div>

CSS

</style> <!-- Ugly Hack to make remote files preload in jsFiddle --> 
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/angularjs/1.2.0-rc.2/angular.min.js"></script>
<style>

JavaScript

angular.module('App', []);

function Ctrl($scope) {
    $scope.testc = "No";
    $scope.processtest = function() {
        if ($scope.testc === "Yes") {
            $scope.testc = 8;
        }
        else {
            $scope.testc = 1;
        }
    };
}