scopes-ng-model-checkbox-input-ng-true-false-value.html

<!DOCTYPE html>
<html>

<head>
  <script data-require="angular.js@1.4.8" data-semver="1.4.8" src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.4.8/angular.min.js"></script>
</head>

<body ng-app>
  <input type="checkbox" ng-init="checkboxInput = 'Checked'" ng-model="checkboxInput" ng-true-value="'Checked'" ng-false-value="'not Checked'">
    My input is "<span ng-bind="checkboxInput"></span>". Change it!
</body>

</html>

http://blog.allii.ir/2016/01/angularjs-begineer-intermediate-course-basics-part-one/#scopes