[igouy]

With any programming language there's a lot of introductory tutorial before we even start to type "hello world".

    ~$ ./visual ./visualnc64.im -nogui -doit "Stdout nextPutAll: 'hello world'; cr. ObjectMemory quit"

hello world

    ~$

— or something like —

    $ cat hello.st
    Stdio stdout 
        nextPutAll: 'hello world'; 
        nextPut: Character lf.!
    SmalltalkImage current snapshot: false andQuit: true!

    $ bin/pharo --headless Pharo10-SNAPSHOT-64bit-502addc.image hello.st