Introduction to Python 3 (2025): Install, Key Features & Your First Program
New to coding? In this beginner-friendly lesson, you’ll learn what Python is, why it’s so popular, and how to install Python 3 and run your very first “Hello, World!” program—step by step.
What you’ll learn
What Python is and where it’s used
7 key features: readability, interpreted, dynamic typing, multi-paradigm, rich standard library, cross-platform, huge community
Python 2 vs Python 3 (why we use Python 3)
Installing Python from python.org (don’t forget to check “Add Python to PATH”)
Writing and running your first script
Code from the video
print("Hello, World!")
Run it
Save as: hello_world.py
In your terminal:
Windows: python hello_world.py
macOS/Linux: python3 hello_world.py (or python hello_world.py depending on your setup)
Chapters
Welcome & goals
What is Python?
Key features (1–7)
Python 2 vs Python 3
Install Python 3
Your first program
Next steps
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