A cumulative sum is a sequence of partial sums of a given sequence. For example, the cumulative sums of the sequence 
, are 
, 
,
, .... Cumulative sums are implemented
as Accumulate[list].
Cumulative Sum
See also
Cumulative Count, Cumulative Product, Moving Average, Partial Sum, SumExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Cumulative Sum." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/CumulativeSum.html