Wiki source for KeyPgOpNot


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{{fbdoc item="title" value="Operator Not (Complement)"}}----
Returns the bitwise-not (complement) of a numeric value

{{fbdoc item="syntax"}}##
[[KeyPgDeclare|declare]] [[KeyPgOperator|operator]] **Not** ( [[KeyPgByref|byref]] //rhs// [[KeyPgAs|as]] [[KeyPgByte|byte]] ) [[KeyPgAs|as]] [[KeyPgInteger|integer]]
[[KeyPgDeclare|declare]] [[KeyPgOperator|operator]] **Not** ( [[KeyPgByref|byref]] //rhs// [[KeyPgAs|as]] [[KeyPgUbyte|ubyte]] ) [[KeyPgAs|as]] [[KeyPgInteger|integer]]
[[KeyPgDeclare|declare]] [[KeyPgOperator|operator]] **Not** ( [[KeyPgByref|byref]] //rhs// [[KeyPgAs|as]] [[KeyPgSingle|single]] ) [[KeyPgAs|as]] [[KeyPgInteger|integer]]
[[KeyPgDeclare|declare]] [[KeyPgOperator|operator]] **Not** ( [[KeyPgByref|byref]] //rhs// [[KeyPgAs|as]] [[KeyPgDouble|double]] ) [[KeyPgAs|as]] [[KeyPgInteger|integer]]

[[KeyPgDeclare|declare]] [[KeyPgOperator|operator]] **Not** ( [[KeyPgByref|byref]] //rhs// [[KeyPgAs|as]] //T// ) [[KeyPgAs|as]] //T//
##
{{fbdoc item="usage"}}##
//result// = **Not** //rhs//
##
{{fbdoc item="param"}}
##//rhs//##
The right-hand side expression.
##//T//##
Any numeric or boolean type.

{{fbdoc item="ret"}}
Returns the bitwise-complement of its operand.

{{fbdoc item="desc"}}
This operator returns the bitwise-complement of its operand, a logical operation that results in a value with bits set depending on the bits of the operand.
(for a boolean type, '##**Not**## false' returns 'true' and '##**Not**## true' returns 'false')

The truth table below demonstrates all combinations of a boolean-complement operation:

{{table columns="2" cellpadding="2" cells="Rhs Bit;Result;0;1;1;0"}}

This operator can be overloaded for user-defined types.

{{fbdoc item="ex"}}
{{fbdoc item="filename" value="examples/manual/operator/not-bitwise.bas"}}%%(freebasic)
' Using the NOT operator on a numeric value

DIM numeric_value AS BYTE
numeric_value = 15 '00001111

'Result = -16 = 11110000
PRINT NOT numeric_value
%%

{{fbdoc item="filename" value="examples/manual/operator/not-logical.bas"}}%%(freebasic)
' Using the NOT operator on conditional expressions
DIM AS UBYTE numeric_value1, numeric_value2
numeric_value1 = 15
numeric_value2 = 25

IF NOT numeric_value1 = 10 THEN PRINT "Numeric_Value1 is not equal to 10"
IF NOT numeric_value2 = 25 THEN PRINT "Numeric_Value2 is not equal to 25"

' This will output "Numeric_Value1 is not equal to 10" because
' the first IF statement is false.
' It will not output the result of the second IF statement because the
' condition is true.
%%

{{fbdoc item="lang"}}
- In the //[[CompilerOptlang|-lang qb]]// dialect, this operator cannot be overloaded.

{{fbdoc item="diff"}}
- None

{{fbdoc item="see"}}
- [[TblTruth|Operator Truth Tables]]

{{fbdoc item="back" value="CatPgOpLogical|Logical Operators"}}{{fbdoc item="back" value="CatPgOperators|Operators"}}
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