Call variables from libraries and use it in our sketches

Hi,

I have this question. Is it possible to do?? For example if I declare a variable (x) in a librarie is it possible to use this variable later in the program?? I hope I explain the problem well.

Thanks in advance.

Is it possible to do?

No. You can't call a variable. You can only call functions.

For example if I declare a variable (x) in a librarie is it possible to use this variable later in the program?

That's a different question. The answer is yes. If you declare the variable correctly and access it correctly.