Texas Instruments Titanium TI-89 User Manual

Calculator Home Screen 226
Ì Returns a message if nn is not an integer or if nn{0.
Í Sums the reciprocals.
Î Returns the sum.
When entering a multi-statement function on the calculator Home screen, you must enter
the entire function on a single line. Use the
Define command just as you would for a
single-statement function.
Note: It’s easier to create a complicated multi-statement function in the Program Editor
than on the calculator Home screen. Refer to Programming.
On the calculator Home
screen:
Define sumrecip(nn)=Func:Local temp,i: ... :EndFunc
Use a colon to separate each
statement.
Use argument names that will never be used
when calling the function or program.
Multi-statement
functions show as
Enter a multi-statement function on
one line. Be sure to include colons.

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)