Interacting with OCaml Code
Interacting without Source Files
Simply run utop on your terminal. You can enter OCaml expressions and let bindings.
Running an OCaml Program
Open your favorite code editor, and create a file called hello.ml that contains the following lines:
let s = "hello"
let _ = print_endline s
Run utop hello.ml to let utop interpret your program from start to finish. You will see "hello" printed on your terminal.
Alternatively, you can run utop with no arguments, and load your program dynamically with
#use "hello.ml";;
You will also see "hello" printed on your screen, but this time utop won't exit. So you can continue to use the interpreter, with everything defined in hello.ml now available for use. For instance, the variable s containing the string "hello" is still available, so you can continue to do
print_endline s;;
Building an OCaml Project with Multiple Files
You will need a build system, like dune, to manage OCaml programs that spread over more than one file. But for the course assignments we will set up everything for you. So no need to worry about this scenario!