What is the reasoning behind the naming of “lvalue” and “rvalue”?

Question

What is the reasoning behind the naming of \"lvalue\" and \"rvalue\" in C/C++ (I know how they function)?

Answer 1

The 'l' in lvalue originated from 'left' value (as in from the left-hand side of the assignment operator); however, it now stands for location value, and refers to any object that occupies some identifiable location in memory (i.e. has an address). An rvalue is now anything that is not an lvalue.