NEGATE: Difference between revisions

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[[_NEGATE]] is a [[Boolean|boolean]] logical operator that will change a false statement to a true one and vice-versa.
{{DISPLAYTITLE:_NEGATE}}
'''_NEGATE''' is a [[Boolean|boolean]] logical operator that will change a false statement to a true one and vice-versa.




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{{PageDescription}}
{{PageDescription}}
* Unlike [[NOT]], which evaluates a value and returns the bitwise opposite, [[_NEGATE]] returns the logical opposite. Meaning that {{InlineCode}}NOT {{Parameter|non_zero_value}} = 0{{InlineCodeEnd}}.
* Unlike [[NOT]], which evaluates a value and returns the bitwise opposite, '''_NEGATE''' returns the logical opposite. Meaning that {{InlineCode}}{{Cl|_NEGATE}} non_zero_value = {{Text|0|#F580B1}}{{InlineCodeEnd}}.
* Often called a negative logic operator, it returns the opposite of a value as true or false.
* Often called a negative logic operator, it returns the opposite of a value as true or false.
{{PageAvailability}}
<!-- QB64 = a version or none, QBPE = a version or all, Platforms = yes or no -->
<gallery widths="48px" heights="48px" mode="nolines">
File:Qb64.png|'''none'''
File:Qbpe.png|'''v3.13.0'''
File:Apix.png
File:Win.png|'''yes'''
File:Lnx.png|'''yes'''
File:Osx.png|'''yes'''
</gallery>
<!-- Additional availability notes go below here -->




{{PageExamples}}
{{PageExamples}}
''Example:'' NOT versus _NEGATE
;Example: NOT versus _NEGATE
{{CodeStart}}
{{CodeStart}}
{{Cl|DECLARE LIBRARY}}
{{Cl|DECLARE LIBRARY}}
     {{Cl|FUNCTION}} {{Text|isdigit&|#55FF55}} ({{Cl|BYVAL}} n {{Cl|AS}} {{Cl|LONG}})
     {{Cl|FUNCTION}} {{Text|isdigit&amp;|#55FF55}} ({{Cl|BYVAL}} n {{Cl|AS}} {{Cl|LONG}})
{{Cl|END DECLARE}}
{{Cl|END DECLARE}}


{{Cl|IF}} {{Cl|NOT}} {{Text|isdigit|#55FF55}}({{Cl|ASC (function)|ASC}}({{Text|<nowiki>"1"</nowiki>|#FFB100}})) {{Cl|THEN}}
{{Cl|IF}} {{Cl|NOT}} {{Text|isdigit|#55FF55}}({{Cl|ASC (function)|ASC}}({{Text|<nowiki>"1"</nowiki>|#FFB100}})) {{Cl|THEN}}
     {{Cl|PRINT}} {{Text|<nowiki>"NOT: 1 is not a digit"</nowiki>|#FFB100}}
     {{Cl|PRINT}} {{Text|<nowiki>"NOT: 1 is not a digit."</nowiki>|#FFB100}}
{{Cl|ELSE}}
{{Cl|ELSE}}
     {{Cl|PRINT}} {{Text|<nowiki>"NOT: 1 is a digit."</nowiki>|#FFB100}}
     {{Cl|PRINT}} {{Text|<nowiki>"NOT: 1 is a digit."</nowiki>|#FFB100}}
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{{Cl|IF}} {{Cl|_NEGATE}} {{Text|isdigit|#55FF55}}({{Cl|ASC (function)|ASC}}({{Text|<nowiki>"1"</nowiki>|#FFB100}})) {{Cl|THEN}}
{{Cl|IF}} {{Cl|_NEGATE}} {{Text|isdigit|#55FF55}}({{Cl|ASC (function)|ASC}}({{Text|<nowiki>"1"</nowiki>|#FFB100}})) {{Cl|THEN}}
     {{Cl|PRINT}} {{Text|<nowiki>"_NEGATE: 1 is not a digit"</nowiki>|#FFB100}}
     {{Cl|PRINT}} {{Text|<nowiki>"_NEGATE: 1 is not a digit."</nowiki>|#FFB100}}
{{Cl|ELSE}}
{{Cl|ELSE}}
     {{Cl|PRINT}} {{Text|<nowiki>"_NEGATE: 1 is a digit."</nowiki>|#FFB100}}
     {{Cl|PRINT}} {{Text|<nowiki>"_NEGATE: 1 is a digit."</nowiki>|#FFB100}}
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{{Cl|END}}
{{Cl|END}}
{{CodeEnd}}
{{CodeEnd}}
{{OutputStart}}NOT: 1 is not a digit
{{OutputStart}}
NOT: 1 is not a digit.
_NEGATE: 1 is a digit.
_NEGATE: 1 is a digit.
{{OutputEnd}}
{{OutputEnd}}
:''Explanation:'' NOT is a bitwise operator that inverts all the bits in an integer, whereas _NEGATE is a logical operator that flips the truth value of a boolean expression.
{{PreStart}}
'''Explanation'''
[[NOT]] is a bitwise operator that inverts all the bits in an integer,
whereas '''_NEGATE''' is a logical operator that flips the truth value of
a boolean expression.
{{PreEnd}}




{{PageSeeAlso}}
{{PageSeeAlso}}
* [https://qb64phoenix.com/forum/showthread.php?tid=2671 Featured in our "Keyword of the Day" series]
* [[_BIT]], [[&B]], [[_BYTE]]
* [[_BIT]], [[&B]], [[_BYTE]]
* [[AND]], [[XOR]], [[OR]]
* [[AND]], [[XOR]], [[OR]]
* [[AND (boolean)]], [[XOR (boolean)]], [[OR (boolean)]]
* [[_ANDALSO]], [[_ORELSE]]
* [[Binary]], [[Boolean]]
* [[Binary]], [[Boolean]]
* [[Mathematical Operations]]
* [[Mathematical Operations]]

Latest revision as of 20:54, 8 December 2024

_NEGATE is a boolean logical operator that will change a false statement to a true one and vice-versa.


Syntax

result = _NEGATE value


Description

  • Unlike NOT, which evaluates a value and returns the bitwise opposite, _NEGATE returns the logical opposite. Meaning that _NEGATE non_zero_value = 0.
  • Often called a negative logic operator, it returns the opposite of a value as true or false.


Availability

  • none

    none

  • v3.13.0

    v3.13.0

  • Apix.png
  • yes

    yes

  • yes

    yes

  • yes

    yes


Examples

Example
NOT versus _NEGATE
DECLARE LIBRARY
    FUNCTION isdigit& (BYVAL n AS LONG)
END DECLARE

IF NOT isdigit(ASC("1")) THEN
    PRINT "NOT: 1 is not a digit."
ELSE
    PRINT "NOT: 1 is a digit."
END IF

IF _NEGATE isdigit(ASC("1")) THEN
    PRINT "_NEGATE: 1 is not a digit."
ELSE
    PRINT "_NEGATE: 1 is a digit."
END IF

END

NOT: 1 is not a digit.
_NEGATE: 1 is a digit.

Explanation
 NOT is a bitwise operator that inverts all the bits in an integer,
 whereas _NEGATE is a logical operator that flips the truth value of
 a boolean expression.


See also


Navigation:
Main Page with Articles and Tutorials
Keyword Reference - Alphabetical
Keyword Reference - By usage
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