John Herrlin has a followup to his previous post about Org-mode code blocks. This one deals with controlling the output of a block’s execution. I usually think of the :results parameter as a way of choosing where the results from the code block should come from. That can be either the “value” of the block (in a lisp sense) or whatever the block outputs to stdout.
But it turns out that the :results parameter can do much more. In a sense, it also controls where the results go. For example, you can have it append the output of the block to previous outputs. Or you can arrange for the results to be wrapped in another code block. Herrlin gives examples of how to take advantage of these capabilities. See his post for the details.
It’s a nice post and definitely worth your time even if you’re already familiar with using Org code blocks.