- Paradigms
- Multi-paradigm : functional , imperative , object-oriented , agent-oriented , metaprogramming , reflective , concurrent
- Family
- ML : Caml : OCaml
- Designed by
- Don Syme , Microsoft Research
- Developer
- Microsoft , The F# Software Foundation
- First appeared
- 2005 ; 21 years ago ( 2005 ) , version 1.0
- Stable release
- 10.0 / 11 November 2025 ; 6 months ago ( 11 November 2025 )
- Typing discipline
- Static , strong , inferred
- Os
- Cross-platform : .NET framework, Mono
- License
- MIT
- Filename extensions
- .fs, .fsi, .fsx, .fsscript
- Website
- fsharp .org , learn .microsoft .com /en-us /dotnet /fsharp