Property	Value
Hex Value	`$B8`
Categories	Catalog > N Test
Localizations	FR: `non(`

`not(`

Overview

Returns 0 if value is ≠ 0. value can be a real number, expression, or list.

Availability: Token available everywhere.

Syntax

not(value)

Arguments

Name	Type	Optional
value

Location

2nd, test, LOGIC, 4:not(

Description

The last logical operator available on the 83 series takes only one value as input. not( comes with its own parentheses to make up for this loss. Quite simply, it negates the input: False becomes True (1) and True returns False (0). not( can be nested; one use is to make any True value into a 1.

:not(0)
           1

:not(-20 and 14)

           0

:not(not(2))
           1

Advanced Uses

not(not(X)) will make any value X into 1 if it's not 0, and will keep it 0 if it is.

Optimization

not(X) and X=0 have the same truth value, but not( is shorter if the closing parenthesis is omitted:

:If A=0
can be
:If not(A

Source: parts of this page were written by the following TI|BD contributors: DarkerLine, GoVegan.

History

Calculator	OS Version	Description
TI-82	1.0	Added

Authors: Adrien Bertrand

not(