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 trialAlan Carvalho
2,401 PointsHow come the function of the 'in' command changes in the for loop?
Isn't the 'in' command supposed to check if the first value is in the second and not setting the first as the second?
1 Answer
Steven Parker
231,268 PointsThe word "in" has 2 different uses in Python. One is as a comparison operator, where it functions as you first describe.
The other is when used with "for", where it assigns a different element of a sequence to a variable for each pass of a loop.
Python recognizes when "for" and "in" are used together and creates a loop instead of making a comparison.