F# is an open-source, strongly typed programming language that was designed by Microsoft in 2005 and encompasses functional, imperative, and object-oriented programming techniques. It has no braces, semicolons, or explicit returns, uses type inference, supports immutability, pattern matching, and partial application, and seamlessly interoperates with .NET libraries while allowing C#-style code. Free resources for learning F# are available online.

1. F#

Appeared in 2005 (version 1.0)

Designed in Microsoft by Don Syme

Open-source, strongly typed, multi-paradigm
programming language encompassing
functional, imperative and object-oriented
programming techniques

5. Quicksort Example









No braces
No semicolons
No explicit 'return'
No type declarations – type inference
Less code, it's compact
Immutability
Pattern matching
Partial application
Constraints

8. More

Seamless interoperation with .NET libraries

Full support for classes and other C# style code

REPL (Read–eval–print loop)

Scripting

9. Free resources

Fsharp.org

Wikibooks. F# programming

F# for fun and profit

F# succintly