Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Python

python get the sum of numbers in a list

I want to prompt the user for a string of items along with the number of said item ex: apples11dogs4cats5dogs5apples2... how to I add together the number of apples there are? ive been able to get to where i have a list of string numbers ['11', '3', '5'] ex now i need to turn them into ints

1 Answer

Steven Parker
Steven Parker
230,274 Points

Did you want to convert the entire list, or just each item?

For each item you could just pass it through "int", for example:   value = int(stringlist[index])

For the whole list, do the same thing in a list comprehension:   numlist = [int(s) for s in stringlist]