Josiastech / f-sharp-hello-world

F# Hello World tutorial

Create F# project from the command line with:

dotnet new console -lang F# -o myFSharpApp

Move to your new app

cd myFSharpApp

The main file in the myFSharpApp folder is Program.fs. By default, it already contains the necessary code to write "Hello World from F#!" to the Console.

open System

[<EntryPoint>]
let main argv =
    printfn "Hello World from F#!"
    0 // return an integer exit code

Define a new function to print a name.

let printGreeting name =
    printfn "Hello %s from F#!" name

Call the function

printGreeting "Ana"

the entire piece of code will look like the following:

open System

let printGreeting name =
    printfn "Hello %s from F#!" name

[<EntryPoint>]
let main argv =
    printGreeting "Ana"
    0 // return an integer exit code