Starter code - Course 4, week 1, assignment1, exercise 3

I think they just mean the template code for the function definition. In other words, they are saying that if you want to run some experiments with the way the loops work and the array slicing, it might be a good idea to do “Insert → Cell Above” and then “copy/paste” the entire contents of the conv_forward cell there and then play around. So if you break things and want to get back to square one, it’s easier. Of course there is also a way to get a fresh copy of any notebook as described on the FAQ Thread, q.v. So if you want to run your experiments “in situ” in the real code, it’s not that big a problem if you need to get back to a clean slate.

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