Texas Instruments TI-89 Manual Book page 546

=
Á
(equal) key
expression1 = expression2
list1 = list2
matrix1 = matrix2
Returns true if
be equal to
Returns false if
not be equal to
Anything else returns a simplified form of the
equation.
For lists and matrices, returns comparisons
element by element.
¥ Á
key
expression1 expression2
list1 list2
matrix1 matrix2
Returns
not equal to
Returns
be equal to
Anything else returns a simplified form of the
equation.
For lists and matrices, returns comparisons
element by element.
<
2 Â
key
expression1 < expression2
list1 < list2
matrix1 < matrix2
Returns
less than
Returns
be greater than or equal to
Anything else returns a simplified form of the
equation.
For lists and matrices, returns comparisons
element by element.
Boolean expression
Boolean list
Boolean matrix
is determined to
expression1
.
expression2
is determined to
expression1
.
expression2
Boolean expression
Boolean list
Boolean matrix
if is determined to be
true expression1
.
expression2
if is determined to
false
expression1
.
expression2
Boolean expression
Boolean list
Boolean matrix
if is determined to be
true
expression1
.
expression2
if is determined to
false
expression1
expression2
Example function listing using math test
symbols: =, ƒ, <, , >, ‚
:g(x)
:Func
:If xë 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) ¸
See "=" (equal) example.
See "=" (equal) example.
.
Appendix A: Functions and Instructions 529