Directives in angularjs

Two types of Directives used Angularjs
1) InBuild Directive
2) Custom Directives

Inbuilt Means : 
  E.g : ng-app, ng-click , ng-class

Custom Directives : 
  E.g : Data-ng-sample

 We have achieve four types
    A) Attribute,
    B) Element,
    C) Classes,
    D) Comment