Azure Functions and Serverless

Azure Functions lets you run event-driven code without managing infrastructure. Write a function, define a trigger, and Azure handles scaling, patching, and availability. It's the core of serverless computing on Azure.

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What Is Serverless?

Serverless doesn't mean no servers — it means you don't manage them. The cloud provider handles all the infrastructure, and you focus entirely on your code.

Serverless Benefits

• No infrastructure management — no VMs to provision, patch, or scale
• Automatic scaling — from zero to thousands of instances
• Pay-per-execution — billed only for the time your code runs
• Built-in high availability — the platform handles fault tolerance

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How Azure Functions Work

The Execution Model

1. You write a function — a small, focused piece of code
2. You define a trigger — the event that causes the function to run
3. Optionally, you configure bindings — declarative connections to input/output data sources
4. When the trigger fires, Azure executes your function and scales automatically

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