cpp #include "" <>

#include <iostream>

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

Explanation:

• #include <iostream>: This line includes the input/output stream library in the program. It allows the use of standard input and output operations.

• int main() { }: This is the main function where the execution of the program begins. It returns an integer value.

• std::cout << "Hello, world!";: std::cout is used to output the text "Hello, world!" to the console.

• return 0;: This line signifies the end of the main function and returns a value of 0 to the operating system, indicating successful execution of the program.