Texas Instruments Titanium TI-89 User Manual

Calculator Home Screen 224
Arguments (x and y in these examples) are placeholders that represent whatever values
you pass to the function. They do not represent the variables x and y unless you
specifically pass x and y as the arguments when you evaluate the function.
Creating a User-Defined Function
Creating a User-Defined FunctionCreating a User-Defined Function
Creating a User-Defined Function
Use one of the following methods.
Method Description
§
Store an expression to a function name (including
the argument list).
Define command Define a function name (including the argument
list) as an expression.
Program Editor Refer to Programming or information on creating a
user-defined function.

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)