What is F sharp ( F# ) ?

Answer 1

F# is most often used as a cross-platform Common Language Infrastructure (CLI) language, but it can also generate JavaScript and graphics processing unit (GPU) code. F# is developed by the F# Software Foundation, Microsoft and open contributors.
For more info look at:
https://dotnet.microsoft.com/languages/fsharp

Answer 2

You can read about F# here:
https://es.m.wikipedia.org/wiki/F_Sharp

Answer 3

I believe it's a functional language developed by Microsoft.

Answer 4

It's the main functional language of .Net. So, having all .Net libraries available make this powerful.