fsi is the REPL (read-eval-print-loop) for the F# programming language.
In my VS Code set up I see the output/FSI frame below the main text editor pane like this: …
visual-studio-code fsi ionideF# has a REPL (read–eval–print loop) F# Interactive, C:\Program Files (x86)\Microsoft F#\v4.0\Fsi.exe. I …
c# .net visual-studio roslyn fsi