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F#

F#

F# is a strongly-typed, functional language that is part of Microsoft's .NET language stack. Although F# is great for data science problems, it can elegantly handle almost every problem you throw at it.

Master F# with
Interactive Learning

Elevate your F# skills through 152 curated exercises across 16 core concepts. Master problem-solving with a structured learning path designed for modern developers.

F#

About F#

F# is a strongly-typed, functional language that is part of Microsoft's .NET language stack.

Although F# is great for data science problems, it can elegantly handle almost every problem you throw at it.

As F# runs on the .NET runtime, you get access to the entire .NET ecosystem, including all packages on nuget.org.

Integration with existing .NET code is further simplified due to F# also allowing you to write object-oriented code.

The home page for F# is fsharp.org and a great introduction to F# can be found at the F# for fun and profit website.

Key Features of F#

Expressive

F# code is very expressive, requiring little code for great results

Fun

F#'s powerful type system is a joy to work with

Safe

F#'s type system helps catch errors at compile-time. No more null-reference exceptions!

Functional first

F# is primarily a functional language, but also has great object-oriented support

Interop

As a member of the .NET ecosystem, F# enjoys full, two-way compatibility with C# code/libraries

Tooling

F# has excellent tooling, with linting and refactoring options built-in

Track icon

Expressive

F# code is very expressive, requiring little code for great results

Fun

F#'s powerful type system is a joy to work with

Safe

F#'s type system helps catch errors at compile-time. No more null-reference exceptions!

Functional first

F# is primarily a functional language, but also has great object-oriented support

Interop

As a member of the .NET ecosystem, F# enjoys full, two-way compatibility with C# code/libraries

Tooling

F# has excellent tooling, with linting and refactoring options built-in

A taste of F# concepts you'll cover

Ba

Basics

Bo

Booleans

Di

Discriminated Unions

St

Strings

If

if-then-else expressions

Nu

Numbers

Pa

Pattern Matching

Ch

Chars

Fl

Floating Point Numbers

Da

Datetimes

Ar

Arrays

Re

Results

Re

Recursion

Li

Lists

Re

Records

Tu

Tuples

Op

Options

Cl

Classes

Hi

Higher Order Functions

Dive into F# practice challenges

Hello World
Hello World
Level 1

SlaveCode's classic introductory exercise. Just say "Hello, World!".

Two Fer
Two Fer
Level 1

Create a sentence of the form "One for X, one for me.".

Leap
Leap
Level 1

Determine whether a given year is a leap year.

Queen Attack
Queen Attack
Level 3

Given the position of two queens on a chess board, indicate whether or not they are positioned so that they can attack each other.

Raindrops
Raindrops
Level 2

Convert a number into its corresponding raindrop sounds - Pling, Plang and Plong.

Accumulate
Accumulate
Level 2

Implement the `accumulate` operation, which, given a collection and an operation to perform on each element of the collection, returns a new collection containing the result of applying that operation to each element of the input collection.