And Operator

[Gary Beene]

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PB/WIN - AND operator

Purpose

The AND operator works as both a logical and a bitwise arithmetic operator.

Syntax

p AND q

Using AND as a logical operator

AND returns TRUE (non-zero) if (and only if) both its operands are TRUE. The AND truth table looks like this:

AND Truth Table

+-----------------+
| x | y | x AND y |
+-----------------+
| T | T | T       |
+-----------------+
| T | F | F       |
+-----------------+
| F | T | F       |
+-----------------+
| F | F | F       |
+-----------------+

Using AND as a bitwise arithmetic operator

AND masks clear selected bits of an integral-class value without affecting the other bits. For example, to clear the most-significant (leftmost) 2 bits in the integer value &H9700, AND it with &H3FFF. That is, the mask contains all 1s, except for the bit positions you want to force to 0:

See Also

Arithmetic Operators, EQV, IMP, ISFALSE, ISTRUE, NOT, OR, XOR