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Summing a list of numbers
#1
I am teaching myself Python and following a YouTube tutorial I input the following:

xs = [12, 14, 10]

for num in xs:
    x += num

print(x)
This works in the tutorial and sums the list to 36, but on my Python I get the following error message:

Python 3.8.2 (tags/v3.8.2:7b3ab59, Feb 25 2020, 22:45:29) [MSC v.1916 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license()" for more information.
>>> 
= RESTART: C:/Users/John/Documents/John''s files/Work/Coding/Think Like a Computer Scientist/Programmes/loop_exercise2a.py
Traceback (most recent call last):
  File "C:/Users/John/Documents/John''s files/Work/Coding/Think Like a Computer Scientist/Programmes/loop_exercise2a.py", line 4, in <module>
    x += num
NameError: name 'x' is not defined
>>> 
I would appreciate any advice or help.

Thank you
Reply


Messages In This Thread
Summing a list of numbers - by Oldman45 - Jul-12-2020, 01:10 PM
RE: Summing a list of numbers - by Yoriz - Jul-12-2020, 01:23 PM
RE: Summing a list of numbers - by palladium - Jul-12-2020, 01:25 PM
RE: Summing a list of numbers - by Yoriz - Jul-12-2020, 01:32 PM
RE: Summing a list of numbers - by palladium - Jul-12-2020, 02:08 PM
RE: Summing a list of numbers - by sridhar - Jul-12-2020, 02:30 PM
RE: Summing a list of numbers - by Oldman45 - Jul-12-2020, 05:30 PM

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