Hit Run but no error message. Cant advance.

```
$VERBOSE = nil # We'll explain this at the end of the lesson.
require 'prime' # This is a module. We'll cover these soon!
def first_n_primes(n)
"n must be an integer" unless n.is_a? Integer
"n must be greater than 0" if n <= 0
prime = Prime.instance
prime.first n
end
puts first_n_primes(10).
```

Any help would be greatly appreciated.

Thanks