Is there anyway of doing simple math using exchange nodes?

I just started using Node-RED, I'm sorry if this was already asked question.

Question is Is there anyway of doing addition, subtraction, multiplication, division other than using function Node.
I want to make a loop of an action without function node, is it possible? How do i do that?

Very easy. Use a change node with JSONATA in it.


Oh god, I didn't know about this!!
This is amazing, thank you!

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