#includeIn this code, we create a CVariant object called "myVariable" and initialize it with the value "Hello, world!" which is a string. We then use the isString function to determine if the variable is a string, and if so, we print out its value using the toString function. The CVariant library is not part of the standard C++ library, but rather an external package that can be installed on your system. Some popular libraries that include variant types and could be used instead are Boost and Qt.CVariant myVariable = "Hello, world!"; // a string variable if (myVariable.isString()) { std::cout << "myVariable is a string with value " << myVariable.toString() << std::endl; }