Atom - S - Sum
  Characters:   S 
Arity: monadic
This atom is monadic, which means it takes one argument.
Functionality
Return the sum of a list (left-reduce over + starting at 0).
Synonyms
This atom should work roughly the same way as or very similarly in concept to the following code snippets (some edge case exceptions may exist):
- +ƒ0
- +/