[Tutor] Module Review

[Alan Gauld]

On 12/04/2023 17:48, Thurman Hill wrote:

> Fill in the blanks to print the even numbers from 2 to 12.
> 
> number = range(2,12+1,2) # Initialize the variable

Notice that in Python 3 range returns a range object.
So number is a range object

> while number > 0: # Complete the while loop condition

Now you are comparing a range object to a number.
Thats not a valid comparison so Python objects.


>     print(number, end=" ")
>     number # Increment the variable

I have no idea how you think that works or what it does.

> # Should print 2 4 6 8 10 12

You don't need a while loop a for loop over the range
will do it just fine

>     while number > 0: # Complete the while loop condition
> TypeError: '>' not supported between instances of 'range' and 'int'

As I explained above - number is a range object.
You can't compare it to a number.

Incidentally even if your code had resulted in a series of
numbers, which I think is what you expected, none of them
would be less than 0 so your loop would never have ended...


A tip for the future: when you hit a problem in Python
that you don't understand use  print statements to see
what you variables look like. In this case a

print(number)

Would have should that it was not in fact a number but a range object.
Also try things out in the interactive prompt:

>>> range(2,12+1,2)

Would also have shown that you got a range object

>>> list(range(2,12+1,2))
[2,4,6,8,10,12]

Would show the content of the list version.

-- 
Alan G
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