In AngularJS, how can you handle errors while making HTTP requests to an external API?

In AngularJS, errors while making HTTP requests to an external API can be handled using error callback functions. When working with promises, developers can attach an error callback to handle any errors that occur during the HTTP request. This ensures a graceful handling of errors and provides an opportunity to notify users or take appropriate actions based on the error type. Understanding how to handle errors in asynchronous operations is a critical skill for AngularJS developers working with external APIs.