How to add two function blocks?

Good morning everyone, I have to add two function blocks, can anyone help me?

Here's a print of my problem.

Thank you for your attention.

See this article in the cookbook for an example of how to join messages into one object.

Once the values are joined in one message, you can access both properties at the same time (in a function or change node etc)

Maybe I expressed myself wrong, could I add the two values?

you were not clear but i understood.

Yes. If they are in the same msg (in the same payload)

That's why I pointed you to the JOIN node and said ...

... meaning you will be able to ADD them together (for example) in a function node