👉 The term "summatory" refers to a mathematical concept that involves the sum of all values in a set. It is often used to denote the total or cumulative sum of an array, list, or other data structure. In mathematics, the summation operator (+) is used for this purpose. For example, if we have a series of numbers: ``` numbers = [1, 2, 3, 4, 5] ``` We can write the sum as: ``
