##### Summing a list of numbers
 Summing a list of numbers Oldman45 Silly Frenchman Posts: 33 Threads: 11 Joined: Jul 2020 Reputation: Jul-12-2020, 01:10 PM (This post was last modified: Jul-12-2020, 01:21 PM by Yoriz.) 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 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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