In Tier 1, you are limited to integer (4 bytes, range -2,147,483,648 to 2,147,483,647), float (4 bytes, range 3.4E +/- 38 (7 digits)) and string types.
There are file commands that work with byte. But, since byte is not supported as a basic type in Tier 1, those commands are really only valuable in Tier 2.
In Tier 2 you have the option for signed and unsigned integers, bytes and longs. A long integer is 8 bytes (-9,223,372,036,854,775,808 to 9,223,372,036,854,775,807). And, you get the boolean type as well. For floating point values you have 4 byte float and an 8 byte double types.
Cheers,
Ancient Lady
AGK Community Tester and AppGameKit Master