noun
cumulative sum; running total
Technical term used in computing and mathematics for a sequence of partial sums of a given sequence.
累積和を計算するアルゴリズムを実装した。
I implemented an algorithm to calculate the cumulative sum.
このグラフは売上の累積和を示している。
This graph shows the cumulative sum of sales.
和 means 'sum' in mathematics; 累積和 is a compound that specifies a cumulative sum.
Compound of 累積 (るいせき, 'accumulation') and 和 (わ, 'sum'). A straightforward technical term formed from Sino-Japanese elements.