How many arguments does the push_back function of the std::vector container accept?

The push_back function of the std::vector container takes exactly one argument — the element to be added to the end of the vector.

Example of usage:

std::vector<int> v;
v.push_back(10); // adds the element 10 to the end of the vector

The argument is passed by value or by const reference (depending on the implementation), but from the calling perspective — it is a single parameter representing the element to be added.