Difference between revisions of "Or"

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== See also ==
 
== See also ==
* [[Shl]]
+
* [[And]]
* [[Shr]]
 
 
* [[Const]]
 
* [[Const]]
 
* [[Function]]
 
* [[Function]]
 
* [[Integer]]
 
* [[Integer]]
 +
* [[Shl]]
 +
* [[Shr]]
 
<br>
 
<br>
 
<br>
 
<br>
 
[[category:Pascal]]
 
[[category:Pascal]]

Revision as of 07:48, 28 October 2014

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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.

See also