Introduction to Python 3 (2025): Install, Key Features & Your First Program

Published: 20 September 2025
on channel: Build Concepts

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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