C++ meaning ::

#include <iostream>

int main() {
    std::cout << "Hello, World!";
    return 0;
}

This C++ program includes the iostream header, which provides functionality for input and output operations. The main function is the entry point of the program. Inside the main function, the std::cout statement is used to output the string "Hello, World!" to the console. The return 0; statement indicates that the program has executed successfully.