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.

Log in to Azure

Sign in to the Azure portal at 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. Select 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 is 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 region near you or near other services your functions 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. Select Create to provision and deploy the function app.

  4. Select the Notification icon in the upper-right corner of the portal and watch for the Deployment succeeded message.

    Define new function app settings

  5. Select Go to resource to view your new function app.

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. This topic shows a C# script function in the portal, but you can create a function in any supported language.

Now, you can run the new function by sending an HTTP request.

Test the function

  1. In your new function, click </> Get function URL at the top right, 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. Add the query string value &name=<yourname> to the end of this URL and press the Enter key on your keyboard to execute the request. You should see the response returned by the function displayed in the browser.

    The following example shows the response in the Edge browser (other browsers may include displayed XML):

    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 arrow at the bottom of the screen to expand the 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 work with subsequent quick starts, tutorials, or with any of the services you have created in this quick start, do not clean up the resources.

Resources in Azure refers to function apps, functions, storage accounts, and so forth. They are grouped into resource groups, and you can delete everything in a group by deleting the group.

You created resources to complete these quickstarts. You may be billed for these resources, depending on your account status and service pricing. If you don't need the resources anymore, here's how to delete them:

  1. In the Azure portal, go to the Resource group page.

    To get to that page from the function app page, select the Overview tab and then select the link under Resource group.

    Select the resource group to delete from the function app page.

    To get to that page from the dashboard, select Resource groups, and then select the resource group that you used for this quickstart.

  2. In the Resource group page, review the list of included resources, and verify that they are the ones you want to delete.

  3. Select Delete resource group, and follow the instructions.

    Deletion may take a couple of minutes. When it's done, a notification appears for a few seconds. You can also select the bell icon at the top of the page to view the notification.

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.