Thank you ! This is what I was searching for (I think the pack helps a lot).

Hello, I'm new to Puredata and programming in general.
I've been looking everywhere to create variables in order to call them in objects, for example :
-a "random" creates a number that changes everytime that I want to call "A"
-I want to make it the goal value of a "line"
Sorry if I don't express it properly !
Thank you for your answers.