C++ accumulate function: Purpose & Usage

The accumulate function is an algorithm function in the C++ standard library that is used to calculate the cumulative value of elements within a given range. Its purpose is to perform a cumulative operation on all elements within a specified range and return the cumulative result. The accumulate function has multiple overloaded forms, allowing for specifying initial values, binary operation functions, and other parameters to make it more flexible and versatile. It is commonly used with iterators to traverse the elements within a container for cumulative operations.