Learn Fsharp - 10 Code Examples & CST Typing Practice Test
F# is a functional-first, strongly typed language on the .NET platform. It blends functional, object-oriented, and imperative styles, offering concise syntax, powerful type inference, and high reliability. Ideal for data science, finance, domain modeling, and backend services.
Learn FSHARP with Real Code Examples
Updated Nov 18, 2025
Installation Setup
Install .NET SDK
Install Ionide in VS Code or use Visual Studio
dotnet new console -lang F#
Install Paket or NuGet dependencies
Use F# REPL (fsi)
Environment Setup
Install .NET SDK
Install Ionide
Setup Paket or NuGet
Use F# REPL
Configure editor tooling
Config Files
.fsproj
nuget.config
paket.dependencies
appsettings.json
Cli Commands
dotnet new console -lang F#
dotnet build
dotnet run
dotnet test
fsi
Internationalization
Culture-aware .NET APIs
Unicode support
Localization via .NET resource files
Accessibility
Clean syntax reduces boilerplate
Type inference avoids repetitive declarations
Pattern matching simplifies branching
Ui Styling
Fable for web UI
Avalonia UI via .NET
Minimal UI coding preferred
State Management
Immutable by default
Mutable values via 'mutable'
Reference cells
Async state machines
Actor-style via Akka.NET
Data Management
Records
Discriminated unions
Sequences, lists, arrays
Type providers
LINQ & .NET collections
Frequently Asked Questions about Fsharp
What is Fsharp?
F# is a functional-first, strongly typed language on the .NET platform. It blends functional, object-oriented, and imperative styles, offering concise syntax, powerful type inference, and high reliability. Ideal for data science, finance, domain modeling, and backend services.
What are the primary use cases for Fsharp?
Financial modeling and trading systems. Data science and ML workflows. Backend microservices on .NET. Domain-driven design (DDD). Scientific computation. Scripting & automation. High-reliability enterprise applications
What are the strengths of Fsharp?
Concise & expressive code. Enterprise-grade reliability on .NET. Strong static typing with inference. Excellent for domain modeling. Great for data processing & analysis
What are the limitations of Fsharp?
Smaller community than C#/Python. Not ideal for UI-heavy applications. Learning curve for functional thinking. Corporate teams often prefer C#. Tooling is improving but not perfect
How can I practice Fsharp typing speed?
CodeSpeedTest offers 10+ real Fsharp code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.