Azure functions or functions as a service - FaaS

Azure provides functions as a resource. They are serverless implementations from Azure. With Azure functions, code can be written in any language the user is comfortable with and an Azure function will provide a runtime to execute them. Based on the language chosen, an appropriate platform is provided to users for bringing their own code. They are a unit of deployment and can automatically be out and in. When dealing with functions, users cannot view the underlying virtual machines and platform but Azure functions provide a small window to see them in terms of the Kudu console.

Azure functions runtime, bindings, and triggers

There are two main components of Azure functions.

Azure function runtime

The core and brain of Azure functions is its Azure runtime. The pre-cursor to Azure functions is Azure web jobs. The code for Azure web jobs also forms the core for Azure functions. There are additional features and extensions added to Azure web jobs...