Texas Instruments Titanium TI-89 User Manual

Programming 590
Note: Because x and y in the function are local, they are not affected by any existing x or
y variable.
Calling One Program from Another
Calling One Program from AnotherCalling One Program from Another
Calling One Program from Another
One program can call another program as a subroutine. The subroutine can be external
(a separate program) or internal (included in the main program). Subroutines are useful
when a program needs to repeat the same group of commands at several different
places.
Function as called from the Home Screen
Function as defined in
the Program Editor
4ùxroot(3,125) 20
:xroot(x,y)
:Func
:y^(1/x)
:EndFunc
3!x:125!y
5

Texas Instruments Titanium TI-89 Specifications

General

Display Type	LCD
Display Resolution	160 x 100 pixels
Memory	188 KB RAM, 2.7 MB Flash ROM
Type	Graphing Calculator
Display	Monochrome
Processor	Motorola 68000
Processor Speed	12 MHz
Power Source	4 AAA batteries
Connectivity	USB
Programming	TI-BASIC, Assembly
Operating System	AMS (Advanced Mathematics Software)