Semiconductor & Computer Engineering
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Difference between revisions of "mirc/identifiers/$not"
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| − | {{mirc title|$not identifier}}'''$not''' returns the binary NOT of | + | {{mirc title|$not identifier}}'''$not''' returns the binary NOT of a number |
== Synopsis == | == Synopsis == | ||
| − | <pre>$not(<N>) | + | <pre>$not(<N>)</pre> |
| − | </pre> | ||
== Parameters == | == Parameters == | ||
| − | N | + | * '''N''' - the number, in base10/decimal |
== Properties == | == Properties == | ||
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; returns: 4294967290 is the signed representation of -6 so 5 is the same as 5 | ; returns: 4294967290 is the signed representation of -6 so 5 is the same as 5 | ||
</pre> | </pre> | ||
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<pre> | <pre> | ||
Latest revision as of 12:10, 30 October 2017
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$not returns the binary NOT of a number
Synopsis[edit]
$not(<N>)
Parameters[edit]
- N - the number, in base10/decimal
Properties[edit]
None
Example[edit]
$not returns the binary NOT of <N>. It returns 0 if the bit is 1, and returns 1 if the bit is 0. In effect, every 1-bit in the result toggles the 0/1 state of the corresponding bit of the input number
//var %n 5 | echo -a $not(%n) $base($not(%n),10,16) ; 4294967290 FFFFFFFA
Here's how the answer was calculated:
- Convert base-10 N to binary. If N is negative, treat as if a signed 32-bit number where the leftmost bit is a 1.
- Flip each 0-bit to 1, and each 1-bit to 0
- Convert the answer from binary to base 10.
//var %n 5 | echo -a $base(%n,10,2,32) | echo -a $str(-,32) | echo -a $base($not(%n),10,2,32) ; returns: 00000000000000000000000000000101 -------------------------------- 11111111111111111111111111111010
//var %n1 4294967290 | var %n2 -6 | echo -a %n1 is the signed representation of %n2 so $not(%n1) is the same as $not(%n2) ; returns: 4294967290 is the signed representation of -6 so 5 is the same as 5
; mIRC doesn't have the $neg function, but if it did, $not(N) would be $neg(N) less 1. //var %n 5 | echo -a $not(%n) is the same as $calc( -%n -1) so NOT of each is the same: $not($not(%n)) is the same as $not($calc( -%n -1))
Compatibility[edit]
Added: mIRC v5.61
Added on: 23 Sep 1999
Note: Unless otherwise stated, this was the date of original functionality.
Further enhancements may have been made in later versions.
See also[edit]
mIRC identifier list