F# · Introductory

Lesson 1 · On the house

Values and printing

let bindings, immutability, printfn format specifiers, and running scripts with dotnet fsi.

Lesson 2

Types and inference

int, float, string, bool, char, explicit annotations, and no implicit numeric conversion.

Lesson 3

Functions and currying

Define functions with let, partial application, and lambdas with fun.

Lesson 4

The pipe operator

|> and >> to chain transformations left to right.

Lesson 5

Lists

Immutable linked lists, cons, ranges, and the List module.

Lesson 6

Tuples and records

Group values with tuples, name them with records, and copy with with.

Lesson 7

Discriminated unions

Model choices with union cases that carry data.

Lesson 8

Pattern matching

match expressions, guards, list patterns, wildcards, and completeness warnings.

Lesson 9

Option instead of null

Some and None, Option.map, Option.defaultValue, and safe lookups.

Lesson 10

Recursion and loops

let rec, tail recursion with accumulators, and for/while loops.