I have created a folder users>user_name>lua_tests in which I have saved the following simple code

A = {{1,2},{3,4}}

io.write(#A,"n")

This executes successfully on a macOS terminal.

I have installed the following extensions:

• Lua: Lua Language Server coded by Lua
• Lua Debug: VSCode debugger extension for Lua
• extensionPath

When I select Run File there is no response.

I am using lua 5.4 on a macOS 10.15.7. I use the same computer to run Python on VSCode without any problems.