Azure Functions is a serverless solution that allows you to write less code, maintain less infrastructure, and save on costs. Here's what you need to know:

  1. Function Apps: A function app provides the execution context for your individual functions. It's the unit of deployment and management for your functions. Think of it as the container that holds your functions together. From an Azure Resource perspective, a function app is equivalent to a site resource (Microsoft.Web/sites) in Azure App Service, which is similar to a web app².

  2. Event-Driven Triggers and Bindings: Azure Functions offers a comprehensive set of event-driven triggers and bindings. These allow you to connect your functions to other services without writing extra code. Some common scenarios include:

    • Processing file uploads from blob storage.
    • Capturing and transforming real-time data from event and IoT sources.
    • Running scheduled tasks or building REST APIs using HTTP triggers.
    • Creating serverless workflows with Durable Functions¹.
  3. Development Lifecycle: You write your function code in your preferred language (C#, Java, JavaScript, PowerShell, Python, and more) using your favorite development tools. Functions integrates directly with Visual Studio, Visual Studio Code, Maven, and other popular tools for seamless debugging and deployments. Azure Monitor and Azure Application Insights provide runtime telemetry and analysis of your functions in the cloud¹.

  4. Hosting Options: Functions offers various hosting options:

    • Consumption Plan: Fully serverless, where you pay only for execution time.
    • Premium Plan: Always warm instances for faster response times.
    • You choose based on your business needs and workload¹.