What are the differences between nested loops and flat loops?

What are the differences between nested loops and flat loops?

Nested loops are loops within loops, allowing for multi-dimensional iteration, while flat loops are single-level iterations.

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 will print pairs of indices.

What about a flat loop example?

A flat loop example would be:

for i in range(5):
    print(i)

This prints numbers from 0 to 4.

When should I use nested loops instead of flat loops?

Use nested loops when dealing with multi-dimensional data structures, like matrices, where you need to iterate through rows and columns.