adding up 2 variables

actually I need from time to time to add one of my (number, integer) variables to another and save it as the third var
I see no way of doing it in the system
but I don't know coding and can't make it via api
what can you recomend? 



You can do this via variables. Create 3 variables and assign two of them with some values. Then, the third variable can be used by {c}={a} + {b}..

but won't it be like text line...? 
for example



you mean, it will analyze it, understand that they are numbers, and render + like add sign, not like text string, right?

ok, I'll try)

Yes, it will add the numbers and not the string.