Is it possible to store the value of a variable in the software?

Question

Delphi

Hello.
After restarting the software, it is required to read data from the program, is it possible to save the value of a variable directly in the program itself? If it is impossible to save the value of a variable in the software, I would like to ask if there are any other ways to save data in the software itself? Tell me which way to dig.
Thank you.
PS I tried to search, I did not find it, maybe I did not formulate the question correctly.
PPS Initially, the value is not known, it must be written at startup and saved in the software.

Answer 1

If it is the value of the variable that is meant and not any file of 100500 MB, then this is called a constant , in any programming language there is a place to be.

Answer 2

Data can be stored in files, in a database.
program variables while it is running are stored in RAM.
Dig in the direction of "working with files" or "Delphi database" or something like that.
In general, Delphi is far from being the best programming environment, there is almost no commercial development on it, there are at least a minimum of jobs. It's better to learn something else.