Difference between revisions of "Or"

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(→‎Boolean operation: Clarify operands must be Boolean)
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= Boolean operation =
 
= Boolean operation =
  
'''Or''' produces a value of [[True|true]] if some value is true and [[False|false]] if both of its operands are false.
+
Boolean '''Or''' produces a value of [[True|true]] if some value is true and [[False|false]] if both of its Boolean operands are false.
  
 
== Truth table ==
 
== Truth table ==
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|style="background: #eeeeee" |   true
 
|style="background: #eeeeee" |   true
 
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= Bitwise operation =
 
= Bitwise operation =

Revision as of 04:52, 14 June 2016

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Boolean operation

Boolean Or produces a value of true if some value is true and false if both of its Boolean 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