#includeIn this example, we create a TString object called myString and set it to "Hello, world!". Then we use the BeginsWith function to check whether myString begins with the prefix "Hello". If it does, we print a message saying so. If it does not, we print a different message. The package library that provides TString BeginsWith is the ROOT library. ROOT is a set of C++ libraries and tools that are used for scientific data analysis, particularly in the fields of particle physics and astronomy. The TString class is one of the many classes provided by the ROOT library, and the BeginsWith function is a member function of that class.#include int main() { TString myString = "Hello, world!"; if (myString.BeginsWith("Hello")) { std::cout << "The string starts with 'Hello'" << std::endl; } else { std::cout << "The string does not start with 'Hello'" << std::endl; } return 0; }