What is the best language for writing cross-platform programs?

Question

Cross-platform

Hello.
My question is, in what language is it better to write programs that will work on both Linux and Windows, and preferably on Mac OS?
I'm just now writing in Python and C#, and I want to write something for an ordinary user who doesn't even know what programming languages ​​are, and wants to run a program without downloading an interpreter, compiler, add. prog, etc.

Python in .exe if I don’t want something :), it turns out to be too heavy.

Answer 1

Nothing has changed - the first in cross-platform is Java

Answer 2

If not Java or C#, then Delphi / Lazarus, C++.
If console, then Crystal (similar to Ruby and compiled), Go.

Answer 3

C++/Qt, with Qt Quick/JS option