Reduce number of division examples

[treyhunner]

Currently we show 5 examples of division in part 1. We did this originally to show the difference between integer/float division. In Python 3 all division results in a float, so I think we can reduce the number of examples.

Currently we have:

4 / 2 1 / 2 3 / 2 15 / 2 1.0 / 2

Maybe we should change this to just a couple. I propose:

4 / 2 3 / 2

[alaindomissy]

yes

[treyhunner]

Actually under "Variables" we also show:

cups_of_flour = 5
cups_of_flour * .5
1 / 2
1.0 / 2

and it says "two different data types" and then shows the type function.

I think we should change the variables part to just cups_of_flour / 2 and leave out the next two lines (since they're equivalent).

Showing the two different number types seems fine, but I'm not sure it's necessary.

[alaindomissy]

when we introduce the notion of type: should we have examples to explain the following:

• you can not add integers with strings: "hello" +5 will error, (strongly type) unlike javascript
• values are typed, variables are not (dynamic typing) unlike java ?

[treyhunner]

@alaindomissy I think we go over your first point pretty well.

We actually use type many times throughout part 1 and we do show concatenation between strings and numbers:

"Hello" + 1
"Hello" + "1"
type(1)
type("1")
"Hello" + str(1)

As for your second point, I vote for answering that question if it comes up but not specifically noting it in the curriculum. I vote for that because that might confuse those not familiar with strictly-typed programming languages already.

[macro1]

Agree with not mentioning differences with other languages unless asked. Analogies are only as good as your target audience's knowledge of them.

[willingc]

+1 to all comments. I plan to work late afternoon until late this evening on the workshop. If this is still open then, I will make changes to the notebook :)

[willingc]

Closing this issue. PR #37 addresses this issue. :cookie: