What are nested loops and how are they used in programming?

What are nested loops and how are they used in programming?

Nested loops are loops within loops, allowing for multi-dimensional iteration. They're useful for tasks like processing multi-dimensional arrays.

Can you give me a real-world example of nested loops?

Sure! A common example is generating a multiplication table, where one loop iterates through the numbers and the inner loop calculates the product.

Are there any performance concerns with using nested loops?

Yes, nested loops can lead to performance issues, especially with large datasets, as their time complexity increases exponentially.

How can I optimize nested loops in my code?

You can optimize nested loops by reducing the number of iterations, using more efficient algorithms, or leveraging data structures like hash tables.