What is the difference between a list and a set in programming?

What is the difference between a list and a set in programming?

A list is an ordered collection that allows duplicate elements, while a set is an unordered collection that does not allow duplicates.

Can you give me an example of when to use a list instead of a set?

Sure! Use a list when you need to maintain the order of elements or allow duplicates, like storing a shopping list.

And when would I prefer a set?

You'd prefer a set when you want to ensure all elements are unique, like tracking unique user IDs.

Are there any performance differences between them?

Yes, sets generally have faster membership tests and insertions compared to lists, especially as the size grows.