Programming

Writing instructions for computers — and learning to think clearly

What Is Programming?

Programming is the process of writing instructions that a computer can execute. At its core, it is problem-solving — breaking a complex task into small, logical steps a machine can follow.

Core Concepts

• Variables — named containers that store data (numbers, text, etc.)
• Control Flow — if/else decisions and loops (for, while)
• Functions — reusable blocks of code that perform a specific task
• Data Structures — arrays, lists, dictionaries, trees, graphs
• Algorithms — step-by-step procedures for solving problems
• Debugging — finding and fixing errors in your code

Popular Languages

• Python — readable, versatile; great for beginners, data science, AI
• JavaScript — the language of the web; runs in every browser
• Java — enterprise applications, Android development
• C / C++ — systems programming, game engines, performance-critical code
• Rust — modern systems language focused on safety and speed

First Program

Tradition says your first program should print "Hello, World!" Here it is in Python:

Software Development Lifecycle

1. Plan — define what you are building
2. Design — architect the structure
3. Code — write the implementation
4. Test — verify it works correctly
5. Deploy — release to users
6. Maintain — fix bugs, add features