3: of course, otherwise, i will lose tract on what functions I defined and might be confusing for others.
It's not only for future use, but also for sharing with others.
2 it's very similar to math concept of range, it's actually very useful to find particular numbers among a range of numbers,
but you have to figure out how to find that number. For odd number, I initially used minus one, then figure out that it should be plus one on the basis of even numbers identified among the range.
It's not about range but I wonder if we could provide a list of numbers and identify numbers that meet requirement among them.
1 A little bit difficult to think what should put into [] i initially defined a new variable. but after read the prompt closely, I found it unnecessary
prompt is helpful.