Calculator User Manual

Appendix A: Functions and Instructions 529
8992APPA.DOC TI-89 / TI-92 Plus: Appendix A (US English) Susan Gullord Revised: 02/23/01 1:48 PM Printed: 02/23/01 2:21 PM Page 529 of 132
=
(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
, <,

, >,
‚
:g(x)
:Func
:If x
ë
5 Then
: Return 5
: E
l
seIf x>
ë
5 an
d
x<0 T
h
en
: Return
ë
x
: ElseIf x‚0 and xƒ10 Then
: Return x
: E
l
seIf x=
1
0 T
h
en
: Return 3
:En
d
If
:En
d
Func
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.
<
2Â
key
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.