BITAND(12; 10) returns 8 (because decimal 12 is binary 1100, and decimal 10 is binary 1010; and 1100 "anded" with 1010 is 1000, which is integer 8).
BITAND( 12; 10) jout 8 (omdat desimaal 12 binary 1100, en desimaal 10 binary 1010 is; en 1100 "anded" mei 1010 is 1000, hokker integer 8 is).