The $ZBITAND function performs an AND function on two bit strings and returns a bit string equal in length to the shorter of the two arguments (containing set bits in those positions where both of the input strings have set bits). Positions corresponding to positions where either of the input strings have a cleared bit, also have cleared bits in the resulting string.
The format for the $ZBITAND() function is:
$ZBITAND(expr1,expr2)
The first expression specifies one of the bit strings that is input to the AND operation.
The second expression specifies the other bit string that is input to the AND operation.