Texas Instruments TI-89 Manual Book page 446

Custom
2 ¾ key
Custom
block
EndCustm
Sets up a toolbar that is activated when you
press 2 ¾. It is very similar to the
instruction except that
ToolBar
statements cannot have labels.
can be either a single statement or a
block
series of statements separated with the ":"
character.
Note: 2 ¾ acts as a toggle. The first
instance invokes the menu, and the second
instance removes the menu. The menu is
removed also when you change applications.
Cycle
CATALOG
Cycle
Transfers program control immediately to the
next iteration of the current loop (
or ).
Loop
is not allowed outside the three looping
Cycle
structures (
CyclePic
CATALOG
CyclePic picNameString, n [, [wait] , [cycles],
[direction]]
Displays all the PIC variables specified and at
the specified interval. The user has optional
control over the time between pictures, the
number of times to cycle through the
pictures, and the direction to go, circular or
forward and backwards.
direction
and backwards. Default = 1.
4Cylind
MATH/Matrix/Vector ops menu
vector 4Cylind
Displays the row or column vector in
cylindrical form [r q, z].
must have exactly three elements. It
vector
can be either a row or a column.
Title
, , or ).
For While Loop
is 1 for circular or ë 1 for forward
Program listing:
:Test()
:Prgm
:Custom
:Title "Lists"
:Item "List1"
and
Item
:Item "Scores"
:Item "L3"
:Title "Fractions"
:Item "f(x)"
:Item "h(x)"
:Title "Graph"
:EndCustm
:EndPrgm
Program listing:
:¦ Sum the integers from 1 to
, ,
For While
100 skipping 50.
:0! temp
:For i,1,100,1
:If i=50
:Cycle
:temp+i! temp
:EndFor
:Disp temp
Contents of
1. Save three pics named
.
pic3
2. Enter:
3. The three pictures (3) will be
displayed automatically—one-half
second (.5) between pictures, for
four cycles (4), and forward and
backwards (ë1).
[2,2,3] 4Cylind ¸
Appendix A: Functions and Instructions
after execution:
temp
,
pic1 pic2
CyclePic " pic ",3,.5,4,ë1
[
2ø ‡2 
5000
, and
p
]
3
4
429