How do you write comments in python?

• In Python 2, range and xrange are used for creating sequences of numbers.
• range returns a list containing all the numbers in the specified range. It generates the entire list in memory.
• xrange, on the other hand, returns an xrange object, which is an iterable. It generates numbers on-the-fly as needed, making it more memory-efficient for large ranges.
• In Python 3, range itself behaves like xrange from Python 2, so there's no xrange in Python 3