A storage location paired with an associated symbolic name, which contains some known or unknown quantity of information referred to as a value.
"Variables in programming are used to store data values that can be changed during the execution of a program."
A type conversion in object-oriented programming where an object of a subclass is treated as an object of its superclass, often used implicitly in polymorphic code to enable abstraction and dynamic behavior.
"Upcasting allows treating a derived class object as a base class object in C++."
A promise-based HTTP client for the browser and node.js.
"Axios simplifies the process of making HTTP requests from the frontend to the backend."
A system of distributed servers that deliver pages and other web content to a user, based on the geographic locations of the user, the origin of the webpage, and the content delivery server.
"Using a CDN can significantly speed up the loading time of your website for users around the world."
