Difference between revisions of "Not"
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| − | = Boolean operation = | + | == Boolean operation == |
'''Not''' produces a value of [[True|true]] if original value is [[False|false]]. | '''Not''' produces a value of [[True|true]] if original value is [[False|false]]. | ||
| − | == Truth table == | + | === Truth table === |
{| class="wikitable" | {| class="wikitable" | ||
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| − | = Bitwise operation = | + | == Bitwise operation == |
Bitwise '''not''' sets the bit to 1 if corresponding bit is 0, and to 0 if bit is 1. | Bitwise '''not''' sets the bit to 1 if corresponding bit is 0, and to 0 if bit is 1. | ||
| − | == Ones' complement == | + | === Ones' complement === |
<syntaxhighlight> | <syntaxhighlight> | ||
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| − | == | + | == See also == |
| + | * [[And]] | ||
| + | * [[Not]] | ||
* [[Shl]] | * [[Shl]] | ||
* [[Const]] | * [[Const]] | ||
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* [[Shortint]] | * [[Shortint]] | ||
* [[Shl#Clear_a_bit| Clear_a_bit]] (bitwise example) | * [[Shl#Clear_a_bit| Clear_a_bit]] (bitwise example) | ||
| + | * [[Bit manipulation]] | ||
[[Category:Pascal]] | [[Category:Pascal]] | ||
Revision as of 14:25, 5 May 2014
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Boolean operation
Not produces a value of true if original value is false.
Truth table
| A | Not A |
|---|---|
| false | true |
| true | false |
Bitwise operation
Bitwise not sets the bit to 1 if corresponding bit is 0, and to 0 if bit is 1.
Ones' complement
function OnesComplement ( const aValue : byte ): byte;
begin
result := Not AValue;
end;If you call OnesComplement(%10000000) then get %01111111 (%10000000 = 128 and %01111111 = 127). If you call OnesComplement(%00000111) then get 248 (248 = %11111000).
function OnesComplement2 ( const aValue : shortint ): shortint;
begin
result := Not AValue;
end;If you call OnesComplement2(%00000010) then get %11111101 (%00000010 = 2 and %11111101 = -3 when type is shortint). If you call OnesComplement2(7) then get -8 (-8 = %11111000 when type is shortint and 7 = %00000111 ).
See also
- And
- Not
- Shl
- Const
- Function
- Byte
- Shortint
- Clear_a_bit (bitwise example)
- Bit manipulation
