Texas Instruments PLUS TI-89 - Manual (Page 454)

Appendix A: Functions and Instructions 437
8992APPA.DOC TI-89 / TI-92 Plus: Appendix A (US English) Susan Gullord Revised: 02/23/01 1:48 PM Printed: 02/23/01 2:21 PM Page 437 of 132
Dialog CATALOG
Dialog
block
EndDlog
Generates a dialog box when the program is
executed.
block can be either a single statement or a
series of statements separated with the “:”
character. Valid
block options in the
… I/O , 1:Dialog menu item in the Program
Editor are 1:Text , 2:Request, 4:DropDown , and
7:Title .
The variables in a dialog box can be given
values that will be displayed as the default
(or initial) value. If ¸ is pressed, the
variables are updated from the dialog box
and variable
ok is set to 1 . If N is pressed,
its variables are not updated, and system
variable
ok is set to zero.
Program listing:
:Dlogtest()
:Prgm
:Dialog
:Title
"This is a dialog box"
:Request "Your name",Str1
:Dropdown "Month you were born",
seq(string(i),i,1,12),Var1
:EndDlog
:EndPrgm
dim() MATH/Matrix/Dimensions menu
dim( list ) ⇒ integer
Returns the dimension of list .
dim({0,1,2}) ¸ 3
dim( matrix ) ⇒ list
Returns the dimensions of matrix as a two-
element list {rows, columns}.
dim([1,л 1,2;л 2,3,5]) ¸ {2 3}
dim( string ) ⇒
integer
Returns the number of characters contained
in character string
string .
dim("Hello") ¸ 5
dim("Hello"&" there") ¸ 11
Disp CATALOG
Disp [ exprOrString1 ] [, exprOrString2 ] ...
Displays the current contents of the Program
I/O screen. If one or more
exprOrString is
specified, each expression or character string
is displayed on a separate line of the Program
I/O screen.
An expression can include conversion
operations such as
4 DD and 4 Rect . You can
also use the 4 operator to perform unit and
number base conversions.
If Pretty Print = ON , expressions are displayed
in pretty print.
From the Program I/O screen, you can press
‡ to display the Home screen, or a program
can use
DispHome .
Disp "Hello" ¸ Hello
Disp cos(2.3) ¸ ë.666…
{1,2,3,4}! L1 ¸
Disp L1 ¸ {1 2 3 4}
Disp 180_min 4 _hr ¸ 3.ø_hr
Note: To type an underscore ( _ ), press:
TI-89: ¥ 
TI-92 Plus: 2 
To type 4, press 2 Ž .