Replace String in AngularJs

<!DOCTYPE html>
<html lang="en">
<head>
 <script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.2.13/angular.min.js"></script>
 <script>
var myApp = angular.module("myApp", []);
 myApp.controller("myController", function($scope) {
 $scope.exampleString = "Hello World !";
 $scope.myString = '';
 $scope.replaceStr = function() {
	 // get & replce the input value
	 $scope.exampleString = $scope.exampleString.replace("World", $scope.myString);
	 
 };
});
</script>
</head>
<body>  
<div ng-app="myApp">  
<div ng-controller="myController"> 
  Enter a value and click "Replace" Button to replace the - "World".<br>
 <input type="text" name="strExample" ng-model="myString"><br>
 <button ng-click='replaceStr()' >Replace</button><br>
String = {{exampleString}}<br>

</div> 
</div>
</body>  
</html>