F＃是一种函数式编程语言，可以轻松编写正确且可维护的代码。
F＃编程主要涉及定义类型推断和自动泛化的类型和函数。 这使您可以将焦点保留在问题域上并操纵其数据，而不是编程的细节。
open System // Gets access to functionality in System namespace. // Defines a function that takes a name and produces a greeting.
let getGreeting name =
sprintf "Hello, %s! Isn't F# great?" name [<EntryPoint>]
let main args =
// Defines a list of names
let names = [ "Don"; "Julia"; "Xi" ] // Prints a greeting for each name!
names
|> List.map getGreeting
|> List.iter (fun greeting -> printfn "%s" greeting)
F＃有许多功能，包括：
- 轻量级语法
- 默认不变
- 类型推断和自动泛化
- 一流的功能
- 强大的数据类型
- 模式匹配
- 异步编程
丰富的数据类型
记录和识别联合等数据类型允许您表示复杂的数据和域。
// Group data with Records
type SuccessfulWithdrawal = {
Amount: decimal
Balance: decimal
} type FailedWithdrawal = {
Amount: decimal
Balance: decimal
IsOverdraft: bool
} // Use discriminated unions to represent data of 1 or more forms
type WithdrawalResult =
| Success of SuccessfulWithdrawal
| InsufficientFunds of FailedWithdrawal
| CardExpired of System.DateTime
| UndisclosedFailure
F＃记录和区分联合在默认情况下是非null，不可变和可比较的，使它们非常容易使用。完整教程阅读http://nopapp.com/Blog/Article/FSharp-What-Is-FSharp