set default value in dropdown list in angularjs

<!DOCTYPE html>
<html>

<head>
  <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.5/angular.min.js"></script>
  <script>
    angular.module("myapp", [])
      .controller("MyController", function($scope) {
        $scope.register = {};
        $scope.register.countryId = "1";

        $scope.register.countries = [{
          id: "1",
          name: "India"
        }, {
          id: "2",
          name: "USA"
        }, {
          id: "3",
          name: "UK"
        }, {
          id: "4",
          name: "Nepal"
        }];
      });
  </script>
</head>

<body ng-app="myapp">
  <div ng-controller="MyController">
    <p>
      <h2>Set default value in dropdown list in AngularJs</h2>
    </p>
    <div>
      Country Name :
      <select ng-model="register.countryId" ng-options="country.id as country.name for country in register.countries"></select>
    </div>
    <div>
      Country-Id : {{register.countryId}}
    </div>
  </div>
  <div>
    <br/><a href="http://www.code-sample.com/2014/11/set-default-value-in-dropdown-list-in.html" target="_blank">Go more example set default value in drop-down...</a></div>
</body>

</html>

// Code goes here

/* Styles go here */