What are the differences between nested loops and regular loops?

What are the differences between nested loops and regular loops?

Regular loops iterate over a sequence, while nested loops are loops within loops, allowing for multi-dimensional iteration.

Can you give me an example of a nested loop?

Sure! Here's a simple example in Python:

for i in range(3):
    for j in range(2):
        print(i, j)

This prints pairs of indices from two ranges.

When should I use nested loops instead of regular loops?

Use nested loops when you need to work with multi-dimensional data structures, like matrices or grids.

Are there performance concerns with using nested loops?

Yes, nested loops can lead to higher time complexity, especially if both loops iterate over large datasets. It's important to optimize.