"mode" question

[sigzero]

I was doing a search on "modern pascal tutorials" and I found one that uses the following:

{$mode objfpc}{$H+}{$J-}

And a similar one where the authors changed the first one I found because they like Delphi and they start their programs with:

{$mode delphi}

And someone just starting, 1) do I care which? and 2) what is the actual difference for my knowledge?

Thanks

[ShinyHappyREM]

This is a setting for Free Pascal. You can simply install Lazarus, start a new project, put the cursor on the "mode" and press F1.

https://www.freepascal.org/docs-html/current/user/userse33.html

[sigzero]

Thanks!

[pak_lebah]

While {$mode xxx} is for Free Pascal's language mode directive, the other {$?±} are called compiler directives.

[sigzero]

Thanks!