Welcome to the Treehouse Community
The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.
Omri Zachay
472 PointsFunction Error
Make a function named add_list that takes a list. The function should then add all of the items in the list together and return the total. Assume the list contains only numbers. You'll probably want to use a for loop. You will not need to use input().
I can't understand what wrong with my code:
def add_list([1,2,3])
for item in add_list:
print (item+item+item)
[MOD: added ```python markdown formattting -cf]
Omri Zachay
472 PointsNow can you see it ?
1 Answer
Chris Freeman
Treehouse Moderator 67,989 PointsThere are 6 issues with your code:
def add_list(a_list): # <--#1 missing colon at end of line. #2 provide parameter instead of hardcoded value
total = 0 # <-- need to initiate total before loop
for item in a_list: # <-- operate on parameter instead of function name
total = total + item # <-- need to accumulate total as for loop runs
return total # <-- need a return statement to send value back. A print is not sufficient
Chris Freeman
Treehouse Moderator 67,989 PointsChris Freeman
Treehouse Moderator 67,989 PointsSorry, your code didn't post to the forum. Can you please add it to your post?