This lesson ignores 0-based indexing


#1

Entering row 2 and column 2 will give you row 3 and column 3 because of 0-based indexing, but the lessons don't correct for this or talk about it.


#2

Because at this point in the track it is moot. We expect what you got.


#3

Moot? My point is that they actually instruct you to write a program that gives the wrong output, not that the user can't figure it out. That's just kind of clumsy.


#4

The author is not considering whether or not the user will intuitively reach for 1..N, and must be of the assumption that everyone by this stage will understand zero-indexing. That's what makes it moot.

If you, like many others before you are insistent upon letting the user enter counting numbers, them tell them to.

guess_row = int(raw_input("Enter a row number (1..5): ")) - 1

In the above the user is sufficiently instructed on expected inputs, and the program adjusts that input to match the reality of the code.


#5

Well yes, I'm not asking for instructions on how to subtract one from a value; I'm just opining that in a total beginner programming course of this sort the author ought to simply consider that. As you can see in some previous posts, it does needlessly confuse the occasional person.


#6

What's more confusing is why people are making this an issue, especially given that this is a very old course with pretty clear instructions.


#7

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