Hi am new to python

Denis McMahon denismfmcmahon at gmail.com
Thu Sep 10 00:35:49 CEST 2015


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 at gmail.com


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