Difference between revisions of "Or"
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== Set a bit == | == Set a bit == | ||
| − | < | + | <syntaxhighlight> |
function SetBit(const AValue, ABitNumber:integer):integer; | function SetBit(const AValue, ABitNumber:integer):integer; | ||
begin | begin | ||
result := AValue or (1 shl ABitNumber); | result := AValue or (1 shl ABitNumber); | ||
end; | end; | ||
| − | </ | + | </syntaxhighlight> |
If you call SetBit(%1000,1) then get %1010 (%1000 = 8 and %1010 = 10). If you call SetBit(10,2) then get 14 (14 = %1110). If you call SetBit(10,1) then get 10. | If you call SetBit(%1000,1) then get %1010 (%1000 = 8 and %1010 = 10). If you call SetBit(10,2) then get 14 (14 = %1110). If you call SetBit(10,1) then get 10. | ||
Revision as of 15:49, 24 March 2012
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Boolean operation
Or produces a value of true if some value is true and false if both of its operands are false.
Truth table
| A | B | A or B |
|---|---|---|
| false | false | false |
| false | true | true |
| true | false | true |
| true | true | true |
Bitwise operation
Bitwise or sets the bit to 1 if one corresponding bits in its operands are 1, and to 0 if they all are 0.
Set a bit
function SetBit(const AValue, ABitNumber:integer):integer;
begin
result := AValue or (1 shl ABitNumber);
end;If you call SetBit(%1000,1) then get %1010 (%1000 = 8 and %1010 = 10). If you call SetBit(10,2) then get 14 (14 = %1110). If you call SetBit(10,1) then get 10.
