&                        Unary Address operator;  Bitwise Binary AND operator

   exp1 & exp2           Bitwise AND operator (used as binary AND operator)

    & performs a bit-by-bit AND operation on exp1 and exp2.  For example:

           i = 4080;            # i == 0x0FF0 == 0000111111110000 (base 2)
           j = 65280;           # j == 0xFF00 == 1111111100000000 (base 2)
           k = i & k;           # k == 0x0F00 == 0000111100000000 (base 2)