One example that I've used in words, and want to try in reality:
Take an eggbox with one row of eggs.
for egg in eggbox:
crack(egg)
and then take them out one at a time and crack them (into a jug, I guess).
Alternatively, number the eggs with a permanent marker from 0, and use
this to display list access.
Main reason for doing this with an eggbox is that it extends to two
dimensions, so the metaphor can extends to numpy array examples with two
indices, which always seems to cause more issues.
Ian
On 03/12/2015 09:24, Karin Lagesen wrote:
The more I teach, the more I realize that I am not really able to
convey what a for loop does to everybody. Do any of you have a
metaphor or something that you use for teaching it? I explain about
variables and collections, and the body of the loop, and I show
examples, but I am still not able to get through all the time.
Karin
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