I think this is broken, it won't advance past the .upcase and .downcase no matter what I do.
Is it saying that you couldn't pass your lesson, or simply not advancing to the next lesson after you press the green button?
I"m having the exact same problem.... how do I advance from here? The .upcase and .downcase executed just fine but it won't go forward.
ruby doesn't distinguish between print and put with the use of parentheses (sic?) you have to identify print or put for it