Difference between revisions of "Xor"
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=== Read more === | === Read more === | ||
| + | * [[Variable_parameter#XOR swap| XOR swap]] | ||
* [[Shl]] | * [[Shl]] | ||
* [[Const]] | * [[Const]] | ||
* [[Function]] | * [[Function]] | ||
* [[Integer]] | * [[Integer]] | ||
Revision as of 20:09, 29 July 2008
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Boolean operation
Exclusive or (xor) results in a value of true if and only if exactly one of the operands has a value of true.
Truth table
| A | B | A xor B |
|---|---|---|
| false | false | false |
| false | true | true |
| true | false | true |
| true | true | false |
Bitwise operation
Bitwise xor sets the bit to 1 where the corresponding bits in its operands are different, and to 0 if they are the same.
Toggle a bit
<delphi> function ToggleBit(const AValue,ABitNumber:integer):integer; begin
result := AValue xor 1 shl ABitNumber;
end; </delphi>
If you call ToggleBit(11,0) then get 10. If you call ToggleBit(10,2) then get 14.
