NEGATE: Difference between revisions
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{{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, | * 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 | |||
{{CodeStart}} | {{CodeStart}} | ||
{{Cl|DECLARE LIBRARY}} | {{Cl|DECLARE LIBRARY}} | ||
{{Cl|FUNCTION}} {{Text|isdigit&|#55FF55}} ({{Cl|BYVAL}} n {{Cl|AS}} {{Cl|LONG}}) | {{Cl|FUNCTION}} {{Text|isdigit&|#55FF55}} ({{Cl|BYVAL}} n {{Cl|AS}} {{Cl|LONG}}) | ||
{{Cl|END DECLARE}} | {{Cl|END DECLARE}} | ||
| Line 32: | Line 46: | ||
{{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}} | ||
{{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
v3.13.0
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
- Featured in our "Keyword of the Day" series
- _BIT, &B, _BYTE
- AND, XOR, OR
- AND (boolean), XOR (boolean), OR (boolean)
- _ANDALSO, _ORELSE
- Binary, Boolean
- Mathematical Operations