What are different route change events ?

While navigating the routes, below events are triggered : 

• $routeChangeStart
• $routeChangeSuccess
  

• $locationChangeStart
• $locationChangeSuccess

app.controller("studentController", function ($route, $http, $rootScope, $log) {
   $rootScope.$on("$locationChangeStart", function () {
       $log.debug("$locationChangeStart triggered...");
   })
 
   $rootScope.$on("$routeChangeStart", function () {
       $log.debug("$routeChangeStart triggered...");
   })
 
   $rootScope.$on("$locationChangeSuccess", function () {
       $log.debug("$locationChangeSuccess triggered...");
   })
 
   $rootScope.$on("$routeChangeSuccess", function () {
       $log.debug("$routeChangeSuccess triggered...");
   })

   var curr = this;
   curr.reloadData = function() {
      $route.reload();
   }
   $http.get("service/api/GetAllStudents").then(
     function(response) {
        curr.students = response.data;
     }
   )
});


Output
$routeChangeStart triggered...
$locationChangeStart triggered...
$locationChangeSuccess triggered...
$routeChangeSuccess triggered...