How do I use fold expressions?

Fold expressions are a feature introduced in C++17 that provide a concise way to apply binary operators over parameter packs. This simplifies the code for operations that need to be performed on multiple parameters, such as summing or multiplying a series of values.

Here’s an example demonstrating how fold expressions work:


        #include 

        template
        auto sum(Args... args) {
            return (args + ...); // Fold expression
        }

        int main() {
            std::cout << "Sum of 1, 2, 3, 4: " << sum(1, 2, 3, 4) << std::endl; 
            return 0;
        }