An indexed name may appear almost anywhere a name can appear.  In particular, since  is valid so is  and .

The op function applied to an indexed name yields the expression sequence of indices appearing within the rightmost brackets, and the zeroth operand is the corresponding name.

The use of the indexed name  does not imply that b is an array.  For instance:

 simply forms a sum of three indexed names.

The assignment of a value to an indexed name will implicitly create a table. Thus the statement:

 creates a table for b and assigns the value 10 to the component of the table indexed by 1.