# How to create a Function in a Function App

By

Paul Tomoiu

●

In 

Azure, 

compute

●

Published 2022-12-03

This tutorial explains what is and how to create a Function App in a Function App.

A Function App provides an execution context in Azure in which your functions run. As such, it is the unit of deployment and management for your functions. A function app comprises one or more individual functions that are managed, deployed, and scaled together. All the functions in a function app share the same pricing plan, deployment method, and runtime version. Think of a function app as a way to organize and collectively manage your functions.

In order to create a Function, from the Azure Console, from "All services" -> "Compute", click on "Function App". You will see the Function App create in How to create a Function App tutorial.

Click on the Function App name, and you will see something like this:

Click on "Functions".

Click on "Create".

I will choose to put the code directly in the Azure Portal.

Choose to trigger this function from an HTTP request. Click on "Create".

Click on "Code + Test".

You can add the following code:

module.exports = async function (context, req) {
context.log('JavaScript HTTP trigger function processed a request.');

    const name = (req.query.name);
    const responseMessage = "Hello "+ name + " ! How are you ?";

    context.res = {
        // status: 200, /* Defaults to 200 */
        body: responseMessage
    };
}

Click on "Save".

Now we can test the function.

From "Overview" -> "Get Function Url" you can take the URL and test it in a web browser.

In my case the URL is : https://functionapp-12321.azurewebsites.net/api/HttpTrigger1?code=gqsnxLPABL0AirUXbEHjhkpFlK3OqXpoBAJ0VaiSb7nlAzFuDaj7kQ==

You need to add a parameter to it: https://functionapp-12321.azurewebsites.net/api/HttpTrigger1?code=gqsnxLPABL0AirUXbEHjhkpFlK3OqXpoBAJ0VaiSb7nlAzFuDaj7kQ==&name=John

I can see in the browser the following page: