What are nested for-each loops in programming?

Can you explain what nested for-each loops are?

Sure! Nested for-each loops are loops within loops, allowing you to iterate over multi-dimensional data structures.

Can you give me an example of how to use nested for-each loops?

Of course! If you have a list of lists, you can use a nested for-each loop to access each element. For example:

for sublist in list_of_lists:
    for item in sublist:
        print(item)

What are some common use cases for nested for-each loops?

Common use cases include processing matrices, generating combinations, and working with complex data structures like trees.

Are there any performance considerations when using nested loops?

Yes, nested loops can lead to increased time complexity, especially with large datasets. It's important to optimize where possible.