Fsharp-Fundamentals

Hello World in F#

Every programming journey starts with Hello World. Let’s write our first F# program and see how clean and expressive functional programming can be.

The Code

Create a file named hello.fsx:

1 …

Variables and Types in F#

In most programming languages, variables are containers you assign values to and change freely. F# takes a different approach. As a functional-first language, F# uses let bindings that are immutable …

Operators in F#

Operators in F# are not just symbols sprinkled between values — they are functions in their own right. Because F# is a functional-first language with static, strong, inferred typing, operators carry …

Control Flow in F#

Control flow determines the order in which your program makes decisions and repeats work. In most imperative languages this means statements that branch and loop. F# takes a different, …

Functions in F#

Functions are the beating heart of F#. As a functional-first language, F# treats functions as first-class values: they can be bound to names, passed as arguments, returned from other functions, …

I/O Operations in F#

Input and output are where a program meets the outside world. In Hello World you saw a single printfn call; here we go further — formatting values for the console, reading input from the user, and …