What is C++?
Understanding C++ as a programming language
Interview Relevant: Frequently asked in entry-level interviews
Last Updated: February 12, 2026
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5 min read
C++ is one of the most powerful and versatile programming languages, widely used in systems programming, game development, and high-performance applications.
Understanding C++
C++ is a general-purpose, statically-typed, compiled programming language that supports procedural, object-oriented, and generic programming paradigms.
Created by Bjarne Stroustrup in 1979 as an extension of C, C++ adds object-oriented features while maintaining the efficiency and low-level access that C provides.
Key Characteristics
- High Performance: C++ compiles directly to machine code, offering exceptional speed.
- Object-Oriented: Supports classes, inheritance, polymorphism, and encapsulation.
- Low-Level Access: Provides direct memory manipulation through pointers.
- Standard Template Library (STL): Rich collection of templates for data structures and algorithms.
- Cross-Platform: Code can be compiled for different operating systems.
Applications of C++
- Game Development: Unreal Engine, Unity (parts), and most AAA games.
- Operating Systems: Windows, Linux kernel modules, macOS components.
- Embedded Systems: IoT devices, automotive systems, robotics.
- Database Systems: MySQL, MongoDB, and other high-performance databases.
- Compilers and Interpreters: GCC, Clang, and language runtimes.
Code Examples
A simple C++ program that prints Hello, World! to the console using iostream.
cpp
1#include <iostream>
2using namespace std;
3
4int main() {
5 cout << "Hello, World!" << endl;
6 return 0;
7}