title: Running scala in intellij with only sbt, pros and cons?
body: <p>im getting started using scala, and i've been struggling a little bit with the setup, since most guide were a bit outdated.</p>
  <p>However, I just ran my first hello world, and things are working fine. At the moment i have not downloaded scala, only sbt- the build tool.
  Im wondering why am i able to run my scala code, without having downloaded scala itself?
  Should i install scala in the long run, or will having sbt in the manner I am now, be sufficient?</p>