2-26 Math, Angle, and Test Operations
8302MATH.DOC TI-83 international English Bob Fedorisko Revised: 02/19/01 12:12 PM Printed: 02/19/01 2:27
PM Page 26 of 26
To display the
TEST LOGIC
menu, press
y
ã
TESTä
~
.
This operator... Returns a 1 (true) if...
TEST LOGIC
1: and
Both values are nonzero (true).
2: or
At least one value is nonzero (true).
3: xor
Only one value is zero (false).
4: not(
The value is zero (false).
Boolean operators are often used in programs to control
program flow and in graphing to control the graph of the
function over specific values. Values are interpreted as
zero (false) or nonzero (true).
and
,
or
, and
xor
(exclusive or) return a value of
1
if an
expression is true or
0
if an expression is false, according
to the table below.
valueA
and
valueB
can be real
numbers, expressions, or lists.
valueA
and
valueB
valueA
or
valueB
valueA
xor
valueB
valueA valueB and or xor
Æ’
0
Æ’
0 returns
110
Æ’
0 0 returns
011
0
Æ’
0 returns
011
0 0 returns
000
not(
returns
1
if
value
(which can be an expression) is
0
.
not(
value
)
Boolean logic is often used with relational tests. In the
following program, the instructions store
4
into
C
.
TEST LOGIC (Boolean) Operations
TEST LOGIC
Menu
Boolean
Operators
and,
or,
xor
not(
Using Boolean
Operations
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