What does an array value reference in ANSI C?

Say I had int foo[10]. Is the place holder foo[0] a pointer to a memory location or range? If so, is there any limit to the amount of bits used? I'm going through K&R and have started a href="http://webcast.berkeley.edu/course_details.php?seriesid=1906978391" rel="nofollow"http://webcast.berkeley.edu/course_detai…/a