Python sum() built-in function
From the Python 3 documentation
Sums start and the items of an iterable from left to right and returns the total. The iterable’s items are normally numbers, and the start value is not allowed to be a string.
Examples
>>> sum([2, 4, 6])
# 12
>>> sum([10, 10, 10])
# 30
Ups! Nothing here yet!
This is a great opportunity for you to collaborate! Hit the link at the end of this page and add some examples and a brief description. If you don't know where to start, the Python 3 documentation will lead you in the right direction.