Flask Fundamentals

Now that you understand how the web works and have your development environment ready, it’s time to start building real web applications.

In this module, you’ll use Flask to create your first backend applications.

What is Flask?

Flask is a lightweight Python web framework.

It gives you the tools to build web applications without forcing a strict structure.

Why Flask?

Flask is ideal for learning because:

• It is simple and easy to understand
• It lets you see how web concepts work directly
• It is flexible and widely used

What You’ll Learn

• How to create a Flask application
• How routing works
• How to render templates
• How to handle user input
• How to return JSON responses

How This Connects to the Course

Flask is your first step into backend development.

• You’ll understand how servers handle requests
• You’ll build real applications
• You’ll prepare for FastAPI and Django

Outcome

By the end of this module, you will be able to build and run a complete Flask application.

Let’s start building.