C++ Introduction & First Program

Key Takeaway:C++ is an extension of C that adds object-oriented features, used for high-performance games, browsers, and engines.

What Is It & Why Use It?

C++ was developed by Bjarne Stroustrup in 1979 as an enhancement to the C language. It gives programmers high control over system memory while providing modern features like classes and objects. It powers Unreal Engine, Google Chrome, and operating systems.

Example Code

#include <iostream>
using namespace std;

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

Language: cpp

Code Line-by-Line Breakdown

#include <iostream>

Header library that allows working with input and output objects like cout.

using namespace std;

Allows using names from the standard library without prefixing std:: every time.

int main() {

Entry point of every C++ program.

cout << "Hello, World!" << endl;

cout (see-out) prints to the screen. << is the stream insertion operator. endl creates a new line.

return 0;

Terminates the main function successfully.

Remember These Rules

C++ uses cout instead of C's printf().

You can chain multiple outputs using <<.

endl flushes the output buffer and moves to a new line.

Quick Test

Which object is used to output text in C++?