variable type

[ak555]

Is there a type of variable that retains its value even after the program is closed and opened again except register variables

[helios]

There's no such thing, and register variables don't work that way.
The only way to do it is by writing to storage.

[Bazzy]

You have to store the value of the value somewhere when you close the program and then read it when the program starts again

[song]

You can store the value to a ini file or XML file.