More "scientific" examples in the for loops lesson

[leouieda]

The instructor training checkout instructions specify:

Try to give exercises a scientific theme: reversing a string isn’t particularly motivational for our audience.

I noticed that is exactly the topic of one of the challenges in the "For loops" chapter. Is there a purpose for this? If not, I could try to come up with a better one (like reversing a list of file names, dates, or something similar).

[gvwilson]

Sure - the challenge is to only use things that we've already introduced.

[eldobbins]

I was looking for a possible issue to solve for my first contribution to this lesson. I came across this because of the labels. However, I'm unclear if this is an issue with this exercise specifically, or a general comment about how to design exercises.

If it's a problem with just this exercise, I'd like to try and fix it. Is it OK to just copy exercises from the Python lesson as mentioned in #431 ? That's an easy solution if acceptable.

If it's a general comment, perhaps the labels should be changed.