Creating a Parameter from other Variables Topic is solved

[mamba]

Hello,
I have two different variables for example:
i set of product
let's say variables are production(i) and demand(i).
Can I create a parameter Inventory(i) from the equation below, do I need to specify that as a parameter or variable, I don't know how to implement on Gams. Can you help me about what to I do?

Inventory(i)=demand(i)-production(i)

Thank you for everything.
Best Regards

[abhosekar]

For parameters, GAMS has to know the values before solving. As demand and production both are variables, you do not know the value of invenotry(i), which is why it has to be a variable.

- Atharv

[mamba]

Hi Dear Atharv,
Thanks for the answer I understand very well you explained to me that in a very clear way and I appreciate that. Have a nice and healthy days.
Best Regards.