AngularJS | API

Last Updated : 30 Apr, 2019

AngularJS APIs are used for comparing, iterating and converting objects.Basic AngularJS API includes

angular.isString()
angular.lowercase()
angular.uppercase()
angular.isNumber()

1. angular.isString()
It is used to check whether an object is a string or not.It returns true if the object is string otherwise false.
Example:

<!-- Write HTML code here -->
<!DOCTYPE html> 
<html> 
  <head> 
<script src= 
"https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js"> 
</script> 
  </head> 
  <body> 
  
    <div ng-app="gfg" ng-controller="gfgCntrl"> 
    <p>{{ object }}</p> 
    <p>{{ apiRes }}</p> 
    </div> 
  
    <script> 
      var app = angular.module('gfg', []); 
      app.controller('gfgCntrl', function($scope) { 
          $scope.object = "GeeksForGeeks"; 
          $scope.apiRes = angular.isString($scope.object); 
      }); 
    </script> 
  
  </body> 
</html> 

Output:

2. angular.lowercase()
It is used to convert all the characters of the string into lowercase characters.
Example:

<!-- Write HTML code here -->
<!DOCTYPE html> 
<html> 
  <head> 
<script src= 
"https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js"> 
</script> 
  </head> 
  <body> 
  
    <div ng-app="gfg" ng-controller="gfgCntrl"> 
    <p>{{ object }}</p> 
    <p>{{ apiRes }}</p> 
    </div> 
  
    <script> 
      var app = angular.module('gfg', []); 
      app.controller('gfgCntrl', function($scope) { 
          $scope.object = "GeeksForGeeks"; 
          $scope.apiRes = angular.lowercase($scope.object); 
      }); 
    </script> 
  
  </body> 
</html> 

Output:

3. angular.uppercase()
It is used to convert all the characters of the string into uppercase characters.
Example:

<!-- Write HTML code here -->
<!DOCTYPE html> 
<html> 
  <head> 
<script src= 
"https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js"> 
</script> 
  </head> 
  <body> 
  
    <div ng-app="gfg" ng-controller="gfgCntrl"> 
    <p>{{ object }}</p> 
    <p>{{ apiRes }}</p> 
    </div> 
  
    <script> 
      var app = angular.module('gfg', []); 
      app.controller('gfgCntrl', function($scope) { 
          $scope.object = "GeeksForGeeks"; 
          $scope.apiRes = angular.uppercase($scope.object); 
      }); 
    </script> 
  
  </body> 
</html> 

Output:

4. angular.isNumber()
It is used to check whether an object is a number or not. It returns true if object is a number otherwise false.
Example:

<!-- Write HTML code here -->
<!DOCTYPE html> 
<html> 
  <head> 
<script src= 
"https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js"> 
</script> 
  </head> 
  <body> 
  
    <div ng-app="gfg" ng-controller="gfgCntrl"> 
    <p>{{ object }}</p> 
    <p>{{ apiRes }}</p> 
    </div> 
  
    <script> 
      var app = angular.module('gfg', []); 
      app.controller('gfgCntrl', function($scope) { 
          $scope.object = "GeeksForGeeks"; 
          $scope.apiRes = angular.isNumber($scope.object); 
      }); 
    </script> 
  
  </body> 
</html> 