Difference between revisions of "Xor"
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{{Xor}} | {{Xor}} | ||
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Back to [[Reserved words]]. | Back to [[Reserved words]]. | ||
| + | The '''xor''' [[Operator|{{HL|operator}}]] compares two [[Boolean|{{HL|boolean}}]] values, and returns true if and only if one of them is true. | ||
= Boolean operation = | = Boolean operation = | ||
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If you call ToggleBit(11,0) then get 10. If you call ToggleBit(10,2) then get 14. | If you call ToggleBit(11,0) then get 10. If you call ToggleBit(10,2) then get 14. | ||
| − | + | {{Logical operators}} | |
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* [[Variable_parameter#XOR swap| XOR swap]] | * [[Variable_parameter#XOR swap| XOR swap]] | ||
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* [[Const]] | * [[Const]] | ||
* [[Function]] | * [[Function]] | ||
* [[Integer]] | * [[Integer]] | ||
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| + | [[Category:Code]] | ||
| + | [[Category:Operators]] | ||
Revision as of 23:45, 16 October 2020
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Back to Reserved words.
The xor operator compares two boolean values, and returns true if and only if one of them is true.
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
function ToggleBit(const AValue,ABitNumber:integer):integer;
begin
result := AValue xor 1 shl ABitNumber;
end;
If you call ToggleBit(11,0) then get 10. If you call ToggleBit(10,2) then get 14.
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