what is an lvalue
L-value, L value or lvalue may refer to: 1  In computer science, a value that points to a storage location, potentially allowing new values to be assigned.2  In space physics, the value assigned to an L-shell, a particular set of planetary magnetic field lines.-value, L value or lvalue may refer to: 1  In computer science, a value that points to a storage location, potentially allowing new values to be assigned.
The original definition of lvalues and rvalues from the earliest days of C is as follows: An lvalue is an expression e that may appear on the left or on the right hand side of an assignment, whereas an rvalue is an expression that can only appear on the right hand side of an assignment.he original definition of lvalues and rvalues from the earliest days of C is as follows: An lvalue is an expression e that may appear on the left or on the right hand side of an assignment, whereas an rvalue is an expression that can only appear on the right hand side of an assignment.