OO Hello World - F#

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Hello world in F# is here.

F# is a great addition to the .NET set of languages because of its functional paradigm support.

You can go directly to the F# Info section to get some extra info about the language.


By the way, you can see my previous post here: http://carlosqt.blogspot.com/2010/06/oo-hello-world.html
where I give some details on WHY these "OO Hello World series" samples.

Version 1 (Minimal):

The minimum you need to type to get your program compiled and running.

type Greet(name:string) = 
    member private self.name = name.[0].ToString().ToUpper() + name.[1..]
    member self.Salute() = printfn "Hello %s!" name

// Greet the world!
 let g = Greet("world")
 g.Salute()

Version 2 (Verbose):

Explicitly adding instructions and keywords that are optional to the compiler.

namespace GreetProgram
open System

type Greet(name:string) = class
    member private self.name = name.[0].ToString().ToUpper() + name.[1..]
    member public self.Salute() = printfn "Hello %s!" self.name
end

// Greet the world!
module GreetModule =
    let g:Greet = new Greet("world")
    g.Salute()

The Program Output:

F# Info:

F# (pronounced “F Sharp”) is the latest addition to the Microsoft programming languages.

“F# is a succinct, expressive and efficient functional and object-oriented language for .NET which helps you write simple code to solve complex problems.” “F# brings you type safe, succinct, efficient and expressive functional programming language on the .NET platform. It is a simple and pragmatic language, and has particular strengths in data-oriented programming, parallel I/O programming, parallel CPU programming, scripting and algorithmic development. It lets you access a huge .NET library and tools base and comes with a strong set of Visual Studio development tools. F# combines the advantages of typed functional programming with a high-quality, well-supported modern runtime system.” Taken from (http://research.microsoft.com/en-us/um/cambridge/projects/fsharp/default.aspx)

“F# is a programming language that provides support for functional programming in addition to traditional object-oriented and imperative (procedural) programming. The Visual F# product provides support for developing F# applications and extending other .NET Framework applications by using F# code. F# is a first-class member of the .NET Framework languages and retains a strong resemblance to the ML family of functional languages.” Taken from: (http://msdn.microsoft.com/en-us/library/dd233154.aspx)

Appeared:	2005
Current Version:	2.0  (latest version in "Languages" page)
Developed by:	Microsoft
Creator:	Don Syme
Influenced by:	OCaml (Xavier Leroy)
Predecessor Language
Predecessor Appeared
Predecessor Creator
Runtime Target:	CLR
Latest Framework Target:	4.0
Mono Target:	Yes
Allows Unmanaged Code:	No
Source Code Extension:	“.fs”, “.fsx”
Keywords:	97
Case Sensitive:	Yes
Free Version Available:	Yes
Open Source:	No
Standard:	No
Latest IDE Support:	Visual Studio 2010 (std, pro, etc) or Visual Studio 2008 (std, pro, shell) http://research.microsoft.com/en-us/um/cambridge/projects/fsharp/release.aspx SharpDevelop 3.2/4.0 (beta) http://www.icsharpcode.net/OpenSource/SD/Download/ MonoDevelop 2.2 http://monodevelop.com/Download
Language Reference:	http://msdn.microsoft.com/en-us/library/dd233154.aspx
Extra Info:	http://en.wikipedia.org/wiki/F_Sharp_(programming_language) http://msdn.microsoft.com/en-us/fsharp/default.aspx http://cs.hubfs.net/