Texas Instruments -84 Plus, Manual Book

Page: 93 / 696

Chapter 2: Math, Angle, and Test Operations 90
TEST LOGIC (Boolean) Operations TEST LOGIC (Boolean) Operations TEST LOGIC (Boolean) Operations TEST LOGIC (Boolean) Operations
TEST LOGIC Menu
TEST LOGIC Menu TEST LOGIC Menu
TEST LOGIC Menu
To display the
TEST LOGIC
menu, press
y : ~
.
Boolean Operators Boolean Operators Boolean Operators 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, xor and, or, xor 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.
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).