[Tutor] Hello

[Sibylle Koczian]

Am 20.04.2023 um 09:50 schrieb mhysnm1964 at gmail.com:
> Bernard
> 
> Loops are used to execute a piece of code based upon specific conditions
> (expressions) in the loop statement or within the code block itself. There
> is three basic loop structures in any language:
> 
...
> 
> The while loop is the 2nd basic loop. This loop performs the expression test
> before any of the code within the loop block. If true, then nothing is
> executed in the loop block. For example:
> 
> A = 5
> While a >4:
>      A -= 1
>      Print (a)
> 
> The expression "a > 4" is true because a is greater than 4. The count and
> print statements are not executed. Change the a variable and the expression
> to get different results.
> 

Wrong. The code inside the while loop is executed as long as the 
expression is true!

Moreover, your code crashes with a NameError: for my part I overlooked 
your mix of A and a, both meaning the same variable. But my Python shell 
was more careful, as it should be:

Python 3.11.3 (tags/v3.11.3:f3909b8, Apr  4 2023, 23:49:59) [MSC v.1934 
64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
 >>> A = 5
 >>> while a > 4:
...     A -= 1
...     print(a)
...
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
NameError: name 'a' is not defined. Did you mean: 'A'?
 >>>

Bernard: additional lesson here, Python is case sensitive. And I didn't 
find any mention of this at the beginning of the tutorial where I'd 
expect it.

HTH
Sibylle