C++ Hello World Program
The "Hello, World!" program in C++ is the fundamental starting point for every aspiring developer. It serves as the perfect introduction to C++ syntax, header files, and basic console output functionality.
Understanding the Code
#include <iostream>
This line is a preprocessor directive. It tells the compiler to include the standard library necessary for cout.
int main() { ... }
The main function is the heartbeat of your program. Every C++ application starts execution from here.
std::cout
Short for "Character Output". It sends the "Hello, World!" text directly to your computer screen.
Pro Tip: Why "return 0"?
In C++, returning 0 tells the Operating System that the program finished successfully. Other numbers usually signal an error.
Core Programming Concepts:
- iostream: Library for data input and output.
- std::cout: Standard output stream object.
- Main Function: Mandatory entry point.
Learning Objectives
- Include the
<iostream>library. - Declare the
int main()entry point. - Use
coutto display "Hello, World!". - Execute and verify the program output.
C++ Hello World Source Code
#include <iostream>
using namespace std;
int main() {
// Standard output to display the message
cout << "Hello, World!" << endl;
return 0; // Signals successful program termination
}Program Console Output:
Hello, World!