What is a variadic template in C++?

A type that is supplied as a parameter inside the definition of a template is known as a type template parameter. Using terms like "typename" or "class," it can be defined, enabling users to designate distinct types or classes for every template declaration.A template that has at least one parameter pack—a placeholder that can take a variable number of arguments—is known as a variable template. This gives templates more flexibility in how they are used by enabling them to function with any amount of arguments, from none to many.