Asynchronous javascript tutorial 4 callback functions

asynchronous javascript is a programming paradigm that allows code to run without blocking the execution of other code. in tutorial 4, the focus is on callback functions, a fundamental concept in managing asynchronous operations. a callback function is a function passed as an argument to another function, enabling the latter to execute it after completing its task. this approach is essential for handling tasks like api calls, file reading, or event handling where results are not immediately available.

callbacks help maintain code organization and flow, but they can lead to "callback hell," where nested callbacks make the code hard to read and maintain. to mitigate this, developers often use techniques like modularization or libraries that promote better structure. understanding callbacks is crucial for mastering asynchronous programming in javascript, as they lay the foundation for more advanced concepts such as promises and async/await, which further enhance code readability and manageability.
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