Xor
From Lazarus wiki
Jump to navigationJump to search
│
Deutsch (de) │
English (en) │
suomi (fi) │
français (fr) │
русский (ru) │
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.
Example:
0101'1010 xor 0011'0100 ――――――――――――― 0110'1110
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
.
operators |
|
---|---|
see also |
|