Texas Instruments TI-89 Titanium User Manual page 881

= Á
(equal) key
expression1 expression2
=
⇒
list1 list2 Boolean list
=
matrix1 matrix2
=
Returns true if
to
expression2
Returns false if
equal to
expression2
Anything else returns a simplified form of the
equation.
For lists and matrices, returns comparisons element
by element.
≠
¥ Á
key
≠
expression1 expression2
⇒
≠
list1 list2 Boolean list
≠
matrix1 matrix2
Returns
true
equal to
expression2
Returns
false
equal to
expression2
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 Boolean list
<
matrix1 matrix2
<
Returns
true
than
expression2
Returns
false
greater than or equal to
Anything else returns a simplified form of the
equation.
For lists and matrices, returns comparisons element
by element.
878
⇒
Boolean expression
⇒
Boolean matrix
is determined to be equal
expression1
.
is determined to not be
expression1
.
⇒
Boolean expression
⇒
Boolean matrix
if is determined to be not
expression1
.
if is determined to be
expression1
.
⇒
Boolean expression
⇒
Boolean matrix
if is determined to be less
expression1
.
if is determined to be
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