the 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.