Difference between revisions of "Xor"

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{{Xor}}
 
{{Xor}}
 
 
 
Back to [[Reserved words]].
 
Back to [[Reserved words]].
  
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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.
  
== See also ==
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{{Logical operators}}
 
 
 
* [[Variable_parameter#XOR swap| XOR swap]]
 
* [[Variable_parameter#XOR swap| XOR swap]]
* [[Shl]]
 
 
* [[Const]]
 
* [[Const]]
 
* [[Function]]
 
* [[Function]]
 
* [[Integer]]
 
* [[Integer]]
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[[Category:Code]]
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[[Category:Operators]]

Latest 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.


navigation bar: Pascal logical operators
operators

and • or • not • xor
shl • shr
and_then (N/A)• or_else (N/A)

see also

{$boolEval} • Reference: § “boolean operators” • Reference: § “logical operators”