C++ is a high-level, object-oriented programming language developed by Bjarne Stroustrup, which extends the C language. It supports various programming paradigms, making it versatile for developing applications like operating systems, browsers, and games. Key features include the use of the iostream header for input/output operations and the std namespace for recognizing built-in functions.

1. INTRODUCTION TO
C++

2. What is C++?
 C++ is a high-level programming language.
 It was developed by Bjarne Stroustrup.
 C++ is an object-oriented programming language which gives a clear structure to its
programs.
 It is an extension of C language.

3. USES OF C++:
C++ is a powerful general-purpose programming language. It can be used to develop operating
systems, browsers, games, and so on. C++ supports different ways of programming like procedural,
object-oriented, functional, and so on. This makes C++ powerful as well as flexible.

4. SYNTAX:
#include<iostream>
using namespace std;
main ()
{
body ()
}

5. #include<iostream>
 Iostream stands for standard input-output stream. This header file contains definitions to objects
like cin, cout, etc. this header file is used to handle the data being read from a file as input or data
being written into the file as output.

6. Using namespace std;
 The namespace actually identifies either it’s a built-in function or a user defined function.
 It contains C++ library built-in functions.
 Std is an abbreviation of standard, it represents standard identifier such as cout, cin etc.
 If we will not add it than it gives us an error as compiler doesn’t recognize these identifiers.