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How to show/hide buttons in AngularJs?

In AngularJs, we can show and hide the div using ng-show and ng-disabled directives. Which are given below.
  1. ng-show directive {{ This directive is used to show the div }}
  2. ng-disabled directive {{ This directive is used to show the div }}

The AngularJs code example
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var $scope;
var app = angular.module('myapp', []);
function myControl($scope) {
}
var $scope;
var app = angular.module('myapp', []);
function myControl($scope) {
}


The live example code 

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<!DOCTYPE html>
<html>
<head lang="en">
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.4/angular.min.js"></script>
<script>
    var $scope;
    var app = angular.module('myapp', []);
    function myControl($scope) {
    }
</script>
</head>
<body>
    <div ng-app="myapp">
    <div ng-controller="myControl">
        First Name :  <input type="text" ng-model="fName" /><br>
        Last Name :  <input type="text" ng-model="lName" /><br>
        <button ng-disabled="!fName || !lName">Submit</button>
    </div>
</div>
</body>
</html>
<!DOCTYPE html>
<html>
<head lang="en">
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.4/angular.min.js"></script>
<script>
    var $scope;
    var app = angular.module('myapp', []);
    function myControl($scope) {
    }
</script>
</head>
<body>
    <div ng-app="myapp">
    <div ng-controller="myControl">
        First Name :  <input type="text" ng-model="fName" /><br>
        Last Name :  <input type="text" ng-model="lName" /><br>
        <button ng-disabled="!fName || !lName">Submit</button>
    </div>
</div>
</body>


</html>

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