You can insert into structures (Structures), lists (Lists), and ranges (Ranges) using subscripts, for example
number is a single integer number which indicates the
index of the element in the list that is to be modified. The first
element has index zero. The index must lie within the valid range.
Insertion into structures can also go according to
keyword must be one of the keywords specified in the
The intention is to expand this kind of insertion to allow multiple
levels of insertion target specifications (such as
y), but this is not yet implemented.