Chapter 2: Math, Angle, and Test Operations
63
TEST LOGIC (Boolean) Operations
TEST LOGIC Menu
To display the
TEST LOGIC
menu, press
y : ~
.
Boolean Operators
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, xor
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
ƒ
0
ƒ
0
returns
1
1
0
ƒ
0
0
returns
0
1
1
0
ƒ
0
returns
0
1
1
0
0
returns
0
0
0
not(
not(
returns
1 if
value
(which can be an expression) is 0.
not(
value
)
Using Boolean Operations
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).
