Hello World

C++ is a high-level, general-purpose programming language created by Danish computer scientist Bjarne Stroustrup. First released in 1985 as an extension of the C programming language, it has since expanded significantly over time.

Let's start with a classic "Hello World".

#include <iostream>

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

This program prints "Hello, World!" to the console.

Includes

#include <iostream> // Include a header file from standard library
#include "../myheader.h" // Include a local custom header file

Includes are instructions to the preprocessor to include external code.

Comments

/*
This is a multi-line comment
spanning multiple lines.
 */

// This is a single-line comment.

Comments are used to write programmers' notes that is to be ignored by the compiler at build time. As you see there, a line comment starts with double slashes //, and a block one is wrapped by /* ... */.

Code Challenge

Try to modify the code provided in the editor to make it print Hello, C++! Here I am!.