The function "calculateSum" is designed to compute the total of a set of numbers. It takes an array of numerical values as input and returns their sum. This function is commonly used in programming to simplify the process of adding multiple numbers together. In many programming languages, "calculateSum" can be implemented using loops or built-in functions. It is useful in various applications, such as financial calculations, data analysis, and statistical computations. By automating the summation process, it helps reduce errors and save time for developers and users alike.