You can solve it by looping n times and printing "Hello World" in each iteration. This basic print logic is often the first step in learning to code a useful concept for beginners using platforms like EnggTools Engineering Tools.

OCaml: let rec printHWn (n : int) : _ = match n with | 0 -> () | _ -> let _ = print_string "Hello World\n" in printHWn (n - 1)

let () = let n = read_int() in printHWn n

Nice work! You've captured functional well by using sequences instead of traditional loops. The Seq.iter is a clean and efficient approach. This mindset in software development emphasizes immutability and higher-order functions, which are core strengths of F# over imperative paradigms like TS and C#. Keep exploring!

Scala

def f(n: Int): Unit = {
  if (n > 0) {
    println("Hello World")
    f(n - 1)      
  }
}

I'm learning F# coming from TS and C#

what about this 2 liner? IHMO the beauty of thinking functional is not thinking about for loops but in term of sequences

open System

let n = Console.ReadLine() |> int
seq { 1 .. n } |> Seq.iter (fun _ -> Console.WriteLine("Hello World") )