Introduction

Your First Program

#include <iostream>
using namespace std;

int main() {
    cout << "Hello, C++!" << endl;
    return 0;
}

Output

Hello, C++!

Line	Meaning
`#include <iostream>`	Brings in input/output tools like `cout` and `cin`.
`using namespace std;`	Lets you write `cout` instead of `std::cout`.
`int main()`	Where every C++ program starts.
`cout << ... ;`	Prints to the screen. `endl` adds a new line.
`return 0;`	Tells the system the program finished successfully.

Compile and run

g++ hello.cpp -o hello
./hello