DEV Community

Andrey Frolov
Andrey Frolov

Posted on

Compile a first program

#ocaml #newbie #howto #tutorial

1) Create a file sum.ml

2) Write this code

open Base
open Stdio

let rec read_and_accumulate accum =
  let line = In_channel.input_line In_channel.stdin in
  match line with
  | None -> accum
  | Some x -> read_and_accumulate (accum +. Float.of_string x)

let () =
  printf "Total: %F\n" (read_and_accumulate 0.)
Enter fullscreen mode Exit fullscreen mode

3) create dune file

(executable
 (name      sum)
 (libraries base stdio))
Enter fullscreen mode Exit fullscreen mode

4) install Stdio

opam install Stdio
Enter fullscreen mode Exit fullscreen mode

5) Use dune to build the binary

dune build sum.ml
Enter fullscreen mode Exit fullscreen mode

6) Execute the program type some number and hit CTRL+d

./_build/default/sum.exe
Enter fullscreen mode Exit fullscreen mode

Top comments (0)

Read next

lylyhandmade profile image

Vệ sinh sản phẩm len handmade như nào cho đúng?

Lyly Handmade -

railsstudent profile image

Build full stack text translation application with Angular and Generative AI

Connie Leung -

wydoinn profile image

Run LLMs Locally Using Ollama (Open Source)

Santhosh -

masumparvej profile image

Earning via Sharing Dev Tools - Gumroad Affiliate

Masum Parvej -