A value of a variable is stored in exactly a single physical memory cell

Explanation

It is convenient to think of computer memory in terms of abstract cells, rather than physical cells since a value of a variable is mostly going to occupy more than a physical cell, which is only eight bits in length. For example, although floating-point values may occupy four physical bytes in a particular implementation of a particular language, a floating-point value is thought of as occupying a single abstract memory cell. The value of each simple non-structured type is considered to occupy a single abstract cell. Henceforth, the term memory cell means abstract
memory cell.