Texas Instruments TI-89 Titanium - Page 276

270 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.