Manual

Variables 427
Qualifying variables
Some app variable names are shared by multiple apps.
For example, the Function app has a variable named
Xmin, but so too does the Polar app, the Parametric app,
the Sequence app, and the Solve app. Although named
identically, these variables usually hold different values. If
you attempt to retrieve the contents of a variable that is
used in more than one app by entering just its name in
Home view, you will get the contents of that version of the
variable in the current app. For example, if the Function
app is active and you enter Xmin in Home view, you will
get the value of Xmin from the Function app. If you want
the value of Xmin from, say, the Sequence app, you must
qualify the variable name. Enter Sequence.Xmin to
retrieve the value of Xmin from the Sequence app.
In the figure to the right,
the value of Xmin from
the Function app was
retrieved first (–10.4…).
The qualified variable
name entered second
retrieved the value of
Xmin from the Sequence
app (–1.8).
Note the syntax required: app_name.variable_name.
The app can be any of the 18 HP apps, or one you have
created based on a built-in app. The name of the app
variable must match a name listed in the app variables
tables below. Spaces are not allowed in an app name
and must be represented by the underscore character:
SX.
Tip
Non-standard characters in variables name—such as 
and —can be entered by selecting them from the special
symbols palette (Sr) or from the characters menu
(Sa ).