What is AngularJS API (Application Programming Interface) ?

The AngularJS Global API is a set of global JavaScript functions for performing common tasks like:

# Comparing an objects
# Iterating an objects
# Converting data
The Global API functions are accessed using the angular object.

Below is a list of some common API functions:

angular.uppercase() : It converts a string to uppercase.
angular.lowercase() : It converts a string to lowercase.
angular.isString() : It returns true if the reference is a string.
angular.isNumber() : It returns true if the reference is a number.

AngularJS API

<div ng-app=“myApp” ng-controller=“mySampleCtrl”>
<p>Name In Capital letter :{{ userName }}</p>
<p>Name In Small letter :{{ userNameSecond }}</p>
</div>

<script>
var app = angular.module(‘myApp’, []);
app.controller(‘mySampleCtrl’, function($scope) {
$scope.userName= “KIRAN”;
$scope.userNameSecond = angular.lowercase($scope.userName);
});
</script>