F# overview

F# is a functional-first, statically-typed language on the .NET CLR, influenced by OCaml and Haskell. It favors immutability, algebraic data types (discriminated unions, records), and a pipeline-oriented style while allowing object-oriented and imperative code when needed. F# excels at domain modeling (type-driven design), data transformation pipelines, financial modeling, and scripting. Its computation expressions (a generalization of monads) support async workflows, sequences, and custom DSLs. F# scripts (.fsx) and the REPL (FSI) make it productive for exploratory data work. It interoperates fully with C# and the NuGet ecosystem, and shares the .NET runtime's performance characteristics.