Return the sum of all elements in a list
The ΣLIST command returns the sum of all the elements in Ldata, i.e.:
$$ \sum_{k=1}^{n}{data_{k}} $$
The list must not be empty and its elements must be suitable for mutual addition.
ΣLIST is not fully equivalent to its userRPL counterpart.
In particular:
Input
4:
3:
2:
1: { 1 'X' '3*Y' }
…………………………………………………………………………………………………………
ΣLIST
Output
4:
3:
2:
1: '1+X+3*Y'
…………………………………………………………………………………………………………
| Command | Short Description | |
|---|---|---|
| →LIST | Assemble a list from its elements | |
| LIST→ | Split a list into its elements | |
| DOLIST | Do a procedure with elements of lists | CHANGED |
| DOSUBS | Do a procedure on a subset of a list | CHANGED |
| MAP | Do a procedure on each element of a list, recursively | |
| MAPLIST→ | Do a procedure on each element recursively, return individual elements | NEW |
| STREAM | Do a procedure on consecutive elements of a list | |
| ΔLIST | First differences on the elements of a list | |
| ΣLIST | Sum of all elements in a list | CHANGED |
| ΠLIST | Product of all elements in a list | CHANGED |
| ADD | Concatenate lists and/or elements | CHANGED |
| SORT | Sort elements in a list | |
| REVLIST | Reverse the order of elements in a list | |
| ADDROT | Add elements to a list, keep only the last N elements | NEW |
| SEQ | Assemble a list from results of sequential procedure |