Introduction to Python

Python is a beginner-friendly, versatile programming language used in web development, data science, automation, and artificial intelligence.

Why Learn Python?

• Clean, readable syntax
• Huge community and job market
• Used at HK universities, tech companies, and banks
• Great for data analysis and automation
• Popular in DSE ICT and computing courses

Installing Python

Download from python.org or use an online editor like Replit.

Check your version:

python --version

Your First Python Program

# Hello World
print("Hello, Hong Kong!")

# Variables
name = "Chan Tai Man"
age = 20
city = "Hong Kong"

print(f"My name is {name}. I am {age} years old from {city}.")

Python vs JavaScript

Feature	Python	JavaScript
Syntax	Indentation-based	Curly braces
Primary use	Backend, data	Frontend, fullstack
Beginner-friendly	Very high	High
HK job demand	High	Very high

Running Python

# In terminal
python app.py

# Or run online at replit.com
print("No installation needed online!")