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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
It is probably new-line character "\n". I have updated test, so they return more accurate message.
No random tests. Add and resubmit.
didn't know that yet when I did this kata, I was a beginner in ruby
Please please please read the comments before your post. The input is n=1000000000 in one of the tests. Find another way to calculate the number of zeros without using factorials.