Memory and Variable Management 680
MAIN folder by default. A system variable or a variable with a reserved name can be
stored in the
MAIN folder only.
By creating additional folders, you can store independent sets of user-defined variables
(including user-defined functions). For example, you can create separate folders for
different TI-89 Titanium applications (Math, Text Editor, etc.) or classes. You can store a
user-defined variable in any existing folder.
The user-defined variables in one folder are independent of the variables in any other
folder. Therefore, folders can store separate sets of variables with the same names but
different values.
Example of variables that
can be stored in MAIN only
Window variables
(xmin, xmax, etc.)
Table setup variables
(TblStart,
@Tbl, etc.)
Y= Editor functions
(y1(x), etc.)
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