Create a Fibonacci series in F#

In this post we are going to see how to create a Fibonacci series in F#. we can create the fibonacci in simple steps.

open System

let rec fib n =

match n with

| 1 -> 1

| 2 -> 1

| n -> fib(n - 1) + fib(n - 2)

   

Press Alt+enter by select the code and enter the Fib 5 in Interactive window.

> fib 6 ;;
val it : int = 8
> fib 20 ;;

val it : int = 6765

From this sample you see how to create the Fibonacci.