I want to combine n messages in a list with a comma in between each message .

I think you may need to use a message box to this, I dont believe you can put a comma in a list box
use messages with add2 and addcomma commands

@gentleclockdivider Use [list prepend] -> [list trim] to automate things for arbitrary list lengths. Check the help for msg->changing messages for more details and methods.

Thanks , the add2 seems the easiest
Need to study the last example in detail

@gentleclockdivider They both use add2 and addcomma, I just automated it and made it agnostic of the size of the list. It is not as complex as it looks.

A more transparent example of my previous version but less general.