Online F# Compiler Features
Functional Programming on .NET
- Experience F#'s functional-first approach while maintaining full .NET interoperability using this fsharp online editor
- Test immutable data structures and pure functions that integrate seamlessly with C# codebases
- Understand why F# is Microsoft's choice for functional programming on the .NET platform
- Practice discriminated unions, pattern matching, and type inference in a production-ready language
Data Transformation Pipelines
- Master the |> pipeline operator for readable, left-to-right data transformations in this f# compiler
- Chain operations like List.map, List.filter, and List.fold in natural, flowing syntax
- Test sequence expressions for processing large datasets with lazy evaluation
- Perfect for data scientists exploring functional approaches to data analysis and ETL pipelines
Type Safety with Flexibility
- Use F#'s units of measure to catch dimensional errors (mixing meters and feet) at compile time
- Define discriminated unions for precise domain modeling—represent states that can't exist
- Experience type providers that generate types from schemas at compile time
- Ideal for developers building reliable systems where correctness matters
No Installation Required
- Run F# code instantly without installing .NET SDK, Visual Studio, or Ionide in this fsharp playground
- Share F# code samples for financial modeling, data analysis, or algorithm demonstrations
- Great for learning F# syntax before building enterprise applications or data pipelines
- Test async workflows, computation expressions, and functional patterns without local setup
F# Keyboard Shortcuts
Experience the power of Replit AI
This entire F# compiler was built by Replit Agent 3 from a natural language prompt. Replit's environment facilitates rapid development, iteration and testing code for users of any technical ability. Develop software faster and better with Replit’s autonomous AI.
Get started freeFrequently Asked Questions
What F# version does this compiler support?
This online f# compiler uses the latest .NET F# Interactive (fsi) with support for modern F# language features including computation expressions, type providers basics, and discriminated unions. You get the full F# experience without local .NET SDK installation.
Can I use F# type providers in this online editor?
Basic type provider syntax is supported, but external data sources aren't accessible in this fsharp playground. Focus on core F# features: immutability, pattern matching, pipeline operators, and functional composition. Perfect for learning F#'s unique approach to functional programming.
Is F# good for data science?
Absolutely! F# excels at data transformation pipelines with its pipeline operator, sequence expressions, and type safety. This fsharp online editor lets you practice functional data analysis patterns. Many data scientists use F# for type-safe ETL and financial modeling.
How does F# compare to C# for .NET development?
F# is functional-first while C# is object-oriented, but both run on .NET and interoperate perfectly. This f# compiler lets you explore F#'s immutability, pattern matching, and type inference. Many teams use F# for domain logic and C# for UI—test F# to see if it fits your needs.
Can I save F# code permanently?
Yes! Click Share to generate a permanent URL for your F# code. Perfect for sharing data transformation logic, algorithm implementations, or functional programming examples with colleagues. Your F# snippet stays accessible indefinitely.
What F# features work in this online compiler?
All core F# language features work: discriminated unions, pattern matching, pipeline operators, computation expressions, async workflows, sequence expressions, and type inference. External libraries and type providers to external data sources aren't available, but you have everything needed to learn F# fundamentals.
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