Introduction
Why F#?
F# is a functional-first, statically typed language for .NET. It blends the expressiveness of functional programming with full access to the .NET ecosystem — making it ideal for data analysis, financial modeling, and robust backend services.
- Functional-first — immutable values, first-class functions, and pattern matching are the default.
- Concise — type inference means you rarely need to write types, but the compiler still catches errors at compile time.
- Algebraic types — discriminated unions and records let you model your domain precisely.
- Currying and pipes — F# functions are curried by default; the
|>pipe operator enables clean left-to-right data transformation. - .NET interop — F# runs on the same CLR as C#, giving you access to all .NET libraries.
What You Will Learn
- Binding values with
let(immutable and mutable) - String interpolation with
$"..." - Conditionals as expressions (
if/elif/else) - Pattern matching with
match - Defining and applying functions (currying, partial application)
- Recursive functions with
let rec - Higher-order functions and anonymous
fun - The pipe operator
|> - Lists, ranges, and common
Listfunctions - Tuples, records, and discriminated unions
Resources
- F# Official Documentation — the official F# language reference.
- F# for Fun and Profit — comprehensive guide to functional programming in F#.
- Tour of F# — a quick walkthrough of F# features.
- Exercism F# Track — practice problems with mentoring.