Difference between revisions of "And"
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Depending on the compiler's specific implementation of the data type [[Set|{{HL|set}}]], the [[Asterisk|intersection of sets]] virtually does the same as the bitwise {{HL|and}}. | Depending on the compiler's specific implementation of the data type [[Set|{{HL|set}}]], the [[Asterisk|intersection of sets]] virtually does the same as the bitwise {{HL|and}}. | ||
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[[Category:Operators]] | [[Category:Operators]] |
Revision as of 19:27, 15 October 2020
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The binary operator and
performs a logical conjunction.
FPC also does a bitwise and
when supplied with ordinal types.
Boolean operation
The operator and
accepts to two Boolean type values.
It is the logical conjunction written in classic logic as [math]\displaystyle{ A \land B }[/math].
Electrical engineers may write [math]\displaystyle{ A \times B }[/math] or [math]\displaystyle{ A \cdot B }[/math], or eliminating the multiplication sign altogether writing [math]\displaystyle{ AB }[/math].
However, the asterisk has a different meaning in programming.
The Boolean and
evaluates to true
if and only if both operands are true
.
A
|
B
|
A or B
|
---|---|---|
false
|
false
|
false
|
false
|
true
|
false
|
true
|
false
|
false
|
true
|
true
|
true
|
Bitwise operation
FPC also defines a bitwise and
.
Taking two ordinal operands logical and
is calculated bit by bit:
1010'1100 and 0011'0100 ―――――――――――― 0010'0100
comparative remarks
Depending on the compiler's specific implementation of the data type set
, the intersection of sets virtually does the same as the bitwise and
.
operators |
|
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see also |
|