Loading collection data...
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.
Go check out the example they give in the instructions that's similar to this test except for the desired population (1200 in example, 1214 in test). Notice they don't return a float for their population after every year of growth.
Not an issue, read this again:
You're working with floats there.