All programming languages have runtime engines that execute their code. In JavaScript, the runtime engine is single-threaded, which means that it runs code line by line or sequentially. The JavaScript runtime engine makes it a synchronous programming language where programs run sequentially. Programming languages that are not synchronous are called

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Learn about asynchronous programming in JavaScript using callbacks, promises, and async/await. Avoid callback hell and handle errors effectively.

Asynchronous Programming in JavaScript – Callbacks, Promises, & Async/Await Examples