Texas Instruments TI-89 Titanium User Manual

878 Appendix A: Functions and Instructions
= (equal) Á key
expression1 = expression2 ⇒ Boolean expression
list1
= list2 ⇒ Boolean list
matrix1
= matrix2 ⇒ Boolean matrix
Returns true if expression1 is determined to be equal
to
expression2 .
Returns false if
expression1 is determined to not be
equal to
expression2 .
Anything else returns a simplified form of the
equation.
For lists and matrices, returns comparisons element
by element.
Example function listing using math test
symbols: =,
ƒ , <, c , >, ‚
:g(x)
:Func
:If xcë 5 Then
: Return 5
: ElseIf x>ë 5 and x<0 Then
: Return ë x
: ElseIf x‚0 and xƒ10 Then
: Return x
: ElseIf x=10 Then
: Return 3
:EndIf
:EndFunc
Graph g(x)
¸
≠ ¥ Á key
expression1 ≠ expression2 ⇒ Boolean expression
list1
≠ list2 ⇒ Boolean list
matrix1
≠ matrix2 ⇒ Boolean matrix
Returns true if expression1 is determined to be not
equal to
expression2 .
Returns
false if expression1 is determined to be
equal to
expression2 .
Anything else returns a simplified form of the
equation.
For lists and matrices, returns comparisons element
by element.
See "=" (equal) example.
< 2Âkey
expression1 < expression2 ⇒ Boolean expression
list1
< list2 ⇒ Boolean list
matrix1
< matrix2 ⇒ Boolean matrix
Returns true if expression1 is determined to be less
than
expression2 .
Returns
false if expression1 is determined to be
greater than or equal to
expression2 .
Anything else returns a simplified form of the
equation.
For lists and matrices, returns comparisons element
by element.
See "=" (equal) example.

Texas Instruments TI-89 Titanium Specifications

General

Display Type	LCD
Display Resolution	160 x 100 pixels
CPU	Motorola 68000
CPU Speed	16 MHz
RAM	256 KB
Flash ROM	2.7 MB
Programming Language	TI-BASIC, Assembly
Power Source	4 AAA batteries
Connectivity	I/O port
Dimensions	7.5 x 3.5 x 1 inches