What are callback functions?

Can you explain what callback functions are?

Sure! A callback function is a function that is passed as an argument to another function and is executed after some operation.

Why are callback functions useful?

They allow for asynchronous programming, enabling code to run without blocking the execution of other code.

Can you give me an example of a callback function?

Of course! In JavaScript, you might use a callback in an event listener like this: button.addEventListener('click', function() { console.log('Button clicked!'); });.

What are the differences between callbacks and promises?

Callbacks can lead to 'callback hell' if nested too deeply, while promises provide a cleaner way to handle asynchronous operations.