What is difference between $interval and window. setInterval in AngularJS?

Answer 1

$interval is an Angular service which wraps the browser's window. setInterval() function. It is also used
to call a JavaScript function repeatedly within a time interval.

var app = angular.module("app", []);
app.controller("MyController", function ($scope, $interval) {
 $interval(callAtInterval, 3000);
});
function callAtInterval() {
 console.log("Interval occurred");
}