band

band( 
x_op1 
x_op2 
[ x_op3 ... ] 
) 
=> x_result

Returns the integer result of the Boolean AND operation on each parallel pair of bits in each operand. Prefix form of the & bitwise operator.

x_op1	Operand to be evaluated.
x_op2	Operand to be evaluated.
x_op3	Optional additional operands to be evaluated.

x_result

Result of the operation.

band(12 13)     
=> 12

band(1 2 3 4 5) 
=> 0