CPP

• C++ is a popular programming language.
• C++ is extension to C language.
• The language has major updates like: C++11, C++14, C++17, C++20
• C++ is an object oriented language

Main Difference between C and C++

• C++ is an extension of C, both language have similar syntax.
• The main difference is C++ supports OOPS i.e. classes & objects, while C doesn't.

Simple C++ Program

#include <iostream>
using namespace std;

int main() {
    cout << "Hello World";
    return 0;
}

• Line 1 : #include <iostream> is a header file library that lets us work with input and output objects, such as cout (used in line 5).
  • Header files add functionality to C++ programs.
• Line 2 : using namespace std; means that we can use names for objects and variables from the standard library.
• Line 4 : int main() { This is a function. Any code inside its curly brackets {} will be executed.
• Line 6 : return 0; A return value of 0 usually indicates that the program terminated successfully. A non-zero value typically signifies an error or an abnormal termination.
  • Not mandatory just a good practice.
  • Every C++ statement ends with a semicolon ;

Program Omitting Namespace

#include <iostream>

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

References :

• Can use online IDE : https://www.onlinegdb.com
• GeeksForGeeks, ChatGPT
• https://www.udemy.com/course/cpp-deep-dive