#includeIn the above example, we declare a string variable named "str" and initialize it with an empty string. Then we use the empty function to check whether the string is empty or not. Since the string is empty, the output will be "The string is empty." Package Library: The String empty function is a member function of the C++ Standard Library. Therefore, no special package/library is required to use it.#include using namespace std; int main() { string str = ""; if (str.empty()) { cout << "The string is empty." << endl; } else { cout << "The string is not empty." << endl; } return 0; }