Definitely Scala.

I, along with half of the developers I work with are taking this course.

So far it's been really good and I'd recommend others who want to program more functionally to take it.
The fact that it uses my favourite language is a bonus too.

How I learned:

Reading loads of tutorials and books on the languages I was learning for a couple of hours a day (still doing this 3 years later even though I'm programming for a living).

How I'd advise you learn:

Get the basics down (if statements, arrays, loops etc), then read up on one intermediate concept a day (inheritance, polymorphism, memory management etc). Then before moving to another concept, write loads of programs that utilize that concept until you are 100% confident that you understand it.
Then the next day, move onto the next concept. Rinse and repeat.

If I could go back, I would have done it this way.


Oh and learn how to google effectively, it's no good searching for something, then giving up once you've gone through the first page of search results.

At the moment, Programming in Scala.
Definitely recommend it for beginners.

For the first three years of my programming career, the answer has been C#.

Though this is very likely to change as I get more and more familiar with Scala.