Glossary: Node.js Basics

Status codes (200, 201, 404, 500)

Also written: Status code, 200, 201, 404, 500, status

The number in a response saying how a request went: 200 OK (it worked, here's the data), 201 Created (a new thing was made), 404 Not Found (nothing at that URL) and 500 Internal Server Error (the server broke; any 5xx is the server's fault).