Boolean Tests; The Not Function - Texas Instruments TITANIUM TI-89 User Manual

From the keyboard, you can type:
Note:
>= for |
<= for {
/= for ƒ
(To get the / character, press e.)

Boolean Tests

Boolean Tests Boolean Tests Boolean Tests
Boolean operators let you combine the results of two separate tests.
Operator True if:
and Both tests are true
or At least one test is true
xor One test is true and the
other is false

The Not Function

The Not Function
The Not Function The Not Function
The function changes the result of a test from true to false and vice versa. For
not
example:
not x>2 is true if
is false if
If you use
Note: not
example, is shown as
not x>2
Programming
{
x 2
x>2
from the Home screen, it is shown as
.
~(x>2)
Example
a>0 and a 10
{
a { 0 or b+c>10
a+6<b+1 xor c<d
in the history area. For
~
605