ith bit of an integer
Major Section: PROGRAMMING
For a nonnegative integer i and an integer j, (logbitp i j)
is the value of the ith bit in the two's complement
representation of j.
(Logbitp i j) has a guard that i is a nonnegative integer and
j is an integer.
Logbitp is a Common Lisp function. See any Common Lisp
documentation for more information.