Understanding the Azure Functions app

The Azure Functions app is an Azure PaaS (platform as a service) where you can build pieces of code (functions), connect them to your application, and use triggers to start them. The concept is quite simple – you build a function in the language you prefer and decide on the trigger that will start it. You can write as many functions as you want in your system. There are cases where the system is written entirely with functions.

The steps to create the necessary environment are as simple as the ones we need to follow to create the function itself. The following screenshot shows the parameters that you must decide on when you create the environment. After you select Create a resource in Azure and filter by Function App, upon clicking the Create button, you will see the following screen:

Figure 16.1: Creating an Azure function app

There are a couple of key points that you should consider while creating your Azure Functions...