Revision [17782]

This is an old revision of KeyPgOpAnd made by FxMwikki on 2015-09-12 08:03:32.

 

Operator AND (Conjunction)


Returns the bitwise-and (conjunction) of two numeric values

Syntax:
Usage:
result = lhs And rhs

Parameters:
lhs
The left-hand side expression.
T1
Any numeric or boolean type.
rhs
The right-hand side expression.
T2
Any numeric or boolean type.
Ret
A numeric or boolean type (varies with T1 and T2).

Return Value:
Returns the bitwise-and (conjunction) of the two operands.

Description:
This operator returns the bitwise-and of its operands, a logical operation that results in a value with bits set depending on the bits of the operands (for conversion of a boolean to an integer, false or true boolean value becomes 0 or -1 integer value).
The truth table below demonstrates all combinations of a boolean-and operation:
Lhs Bit Rhs Bit Result
0 0 0
1 0 0
0 1 0
1 1 1

No short-circuiting is performed - both expressions are always evaluated.

The return type depends on the types of values passed. KeyPgByte Byte, KeyPgUbyte Ubyte and floating-point type values are first converted to KeyPgInteger Integer. If the left and right-hand side types differ only in signedness, then the return type is the same as the left-hand side type (T1), otherwise, the larger of the two types is returned. Only if the left and right-hand side types are both Boolean, the return type is also Boolean.
This operator can be overloaded for user-defined types.

Examples:
' Using the AND operator on two numeric values
Dim As UByte numeric_value1, numeric_value2
numeric_value1 = 15 '00001111
numeric_value2 = 30 '00011110

'Result =  14  =     00001110
Print numeric_value1 And numeric_value2
Sleep


' Using the AND operator on two conditional expressions
Dim As UByte numeric_value1, numeric_value2
numeric_value1 = 15
numeric_value2 = 25

If numeric_value1 > 10 And numeric_value1 < 20 Then Print "Numeric_Value1 is between 10 and 20"
If numeric_value2 > 10 And numeric_value2 < 20 Then Print "Numeric_Value2 is between 10 and 20"
Sleep

' This will output "Numeric_Value1 is between 10 and 20" because
' both conditions of the IF statement is true
' It will not output the result of the second IF statement because the first
' condition is true and the second is false.


Dialect Differences:
Differences from QB:
See also:
Back to Logical Operators
Back to Operators
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