Create your first function in the Azure portal

Azure Functions lets you execute your code in a serverless environment without having to first create a VM or publish a web application. In this topic, learn how to use Functions to create a "hello world" function in the Azure portal.

Create function app in the Azure portal

If you don't have an Azure subscription, create a free account before you begin.

Sign in to Azure

Open the Azure portal. To do this, sign in to the Azure portal with your Azure account.

Create a function app

You must have a function app to host the execution of your functions. A function app lets you group functions as a logic unit for easier management, deployment, and sharing of resources.

  1. Click the New button found on the upper left-hand corner of the Azure portal, then select Compute > Function App.

    Create a function app in the Azure portal

  2. Use the function app settings as specified in the table below the image.

    Define new function app settings

    Setting Suggested value Description
    App name Globally unique name Name that identifies your new function app. Valid characters are a-z, 0-9, and -.
    Subscription Your subscription The subscription under which this new function app will be created.
    Resource Group myResourceGroup Name for the new resource group in which to create your function app.
    OS Windows Serverless hosting is currently only available when running on Windows. For Linux hosting, see Create your first function running on Linux using the Azure CLI.
    Hosting plan Consumption plan Hosting plan that defines how resources are allocated to your function app. In the default Consumption Plan, resources are added dynamically as required by your functions. In this serverless hosting, you only pay for the time your functions run.
    Location West Europe Choose a location near you or near other services your functions will access.
    Storage account Globally unique name Name of the new storage account used by your function app. Storage account names must be between 3 and 24 characters in length and may contain numbers and lowercase letters only. You can also use an existing account.
  3. Click Create to provision and deploy the new function app.

Favorite Functions in the portal

If you haven't already done so, add Function Apps to your favorites in the Azure portal. This makes it easier to find your function apps. If you have already done this, skip to the next section.

  1. Log in to the Azure portal.

  2. Click the arrow at the bottom left to expand all services, type Functions in the Filter field, and then click the star next to Function Apps.

    Create function app in the Azure portal

    This adds the Functions icon to the menu on the left of the portal.

  3. Close the menu, then scroll down to the bottom to see the Functions icon. Click this icon to see a list of all your function apps. Click your function app to work with functions in this app.

    Function Apps in Favorites

Next, you create a function in the new function app.

Create an HTTP triggered function

  1. Expand your new function app, then click the + button next to Functions.

  2. In the Get started quickly page, select WebHook + API, Choose a language for your function, and click Create this function.

    Functions quickstart in the Azure portal.

A function is created in your chosen language using the template for an HTTP triggered function. You can run the new function by sending an HTTP request.

Test the function

  1. In your new function, click </> Get function URL, select default (Function key), and then click Copy.

    Copy the function URL from the Azure portal

  2. Paste the function URL into your browser's address bar. Append the query string &name=<yourname> to this URL and press the Enter key on your keyboard to execute the request. The following is an example of the response returned by the function in the Edge browser:

    Function response in the browser.

    The request URL includes a key that is required, by default, to access your function over HTTP.

  3. When your function runs, trace information is written to the logs. To see the trace output from the previous execution, return to your function in the portal and click the up arrow at the bottom of the screen to expand Logs.

    Functions log viewer in the Azure portal.

Clean up resources

Other quick starts in this collection build upon this quick start. If you plan to continue on to work with subsequent quick starts or with the tutorials, do not clean up the resources created in this quick start.

If you do not plan to continue, click the Resource group for the function app in the portal, and then click Delete.

Select the resource group to delete from the function app.

Next steps

You have created a function app with a simple HTTP triggered function.

Learn how to create functions with other kinds of triggers or how to integrate functions with other Azure services.

For more information, see Azure Functions HTTP and webhook bindings.