Response codes

Response codes, better known as HTTP status codes, tell us about the status of a request. If an HTTP request is successful, the HTTP status code is 200 which means OK. If there is a server error, it returns 500 status code which means an internal server error. In case of any problem in the request, the HTTP status code is 400 and onwards where 400 status code means a bad request. In case of redirection, the response code is 300 and onwards.

To see the complete list of response code and their usage, see https://en.wikipedia.org/wiki/List_of_HTTP_status_codes

I won't go into details of it as it would be redundant since all of it is already available at the preceding mentioned Wikipedia link. However, we will discuss the different status codes as we proceed.