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Re: Hi am new to python

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  Re: Hi am new to python Denis McMahon <denismfmcmahon@gmail.com> - 2015-09-09 22:35 +0000
    Re: Hi am new to python Emile van Sebille <emile@fenx.com> - 2015-09-09 16:16 -0700

#96230 — Re: Hi am new to python

On Tue, 08 Sep 2015 17:44:26 -0500, Nassim Gannoun wrote:

> My question is in a while loop; how do l sum all the numbers in the
> given list (list_a)?

You don't normally use a while loop or a counter to iterate over a list. 
Such a question should only be used as a precursor to discussing better 
methods of achieving the required result.

While loop:

> sum_a = 0 
> i = 0 
> while i < (len(list_a)):
>         sum_a += list_a[i]
>         i += 1
> print(sum_a)

Better, use a for loop:

s = 0
for i in list_a:
    s += i
print (s)

Even better, use sum():

s = sum(list_a)
print (s)

And if you only want to display the answer:

print (sum(list_a))

-- 
Denis McMahon, denismfmcmahon@gmail.com

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#96231

On 9/9/2015 3:35 PM, Denis McMahon wrote:
> On Tue, 08 Sep 2015 17:44:26 -0500, Nassim Gannoun wrote:
>
>> My question is in a while loop; how do l sum all the numbers in the
>> given list (list_a)?
>
> You don't normally use a while loop or a counter to iterate over a list.
> Such a question should only be used as a precursor to discussing better
> methods of achieving the required result.

As I understand it, the OP was given the homework assignment to sum up a 
list of numbers using while.  Too bad he didn't also specify using 
binary operators along with while.  :)

Emile

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