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![Dustin Jasmin](https://secure.gravatar.com/avatar/baa0bf9813893094864b254450235229?s=96&d=https%3A%2F%2Fecs-static.teamtreehouse.com%2Fassets%2Fcontent%2Fdefault_avatar-445fbbabfc8dc9188fb5967fe43322ee0c3e0dd1e10f378bf8343784af5a13eb.webp&r=pg)
Dustin Jasmin
3,156 PointsCombo Challenge
I do not know how this challenge works at all. Can anyone help?
# combo([1, 2, 3], 'abc')
# Output:
# [(1, 'a'), (2, 'b'), (3, 'c')]
def combo(first_iterable, second_iterable):
1 Answer
![Oszkár Fehér](https://uploads.teamtreehouse.com/production/profile-photos/4620912/micro_Me_4.jpg)
Oszkár Fehér
Treehouse Project ReviewerHi Dustin. Please give it a try first and after post your code and from there we can help you out. We could write to you the code but like that we don't help you to learn, just to pass the quiz. Give it a try, whatever you can write. If you are still stucked, give me a feedback and we continue from there. Happy coding.
Dustin Jasmin
3,156 PointsDustin Jasmin
3,156 PointsI have a question. When I was looking through the community posts, many made a variable and set it equal to 0 and then made a for loop where they then made the variable +=1, why is that so?
Chris Freeman
Treehouse Moderator 68,425 PointsChris Freeman
Treehouse Moderator 68,425 PointsDustin Jasmin, what you describe is creating a loop counter that is incremented during each iteration of the loop.