Sure, here is the detailed tutorial:

Azure Functions: A Step-by-Step Guide

1. Introduction

In this tutorial, we will cover how to create and deploy Azure Functions. Azure Functions is a serverless compute service that allows you to run code without having to provision or manage infrastructure.

By the end of this tutorial, you will be able to create your own Azure Functions, understand the basic concepts and architecture of Azure Functions, and deploy them on Azure.

Prerequisites:
- Basic knowledge of C# or JavaScript
- An active Azure account

2. Step-by-Step Guide

Azure Functions allows you to write less code, maintain less infrastructure, and save on costs. Here's how you can get started:

Step 1: Navigate to the Azure portal and click on "Create a Resource". Search for "Function App" and click on "Create".

Step 2: Fill in the necessary details like the subscription, resource group, function app name, runtime stack (choose .NET or Node.js), version, region, etc., and click on "Review + Create".

Step 3: Once the function app gets created, navigate to it and click on the "+ Function" button to create a function.

Step 4: You can choose to create a function in the portal, using Visual Studio, or from Azure CLI. Choose the appropriate option and follow the steps.

Step 5: Write the function code. The function code gets triggered by a specific event. You can choose from various triggers like HTTP, timer, Cosmos DB, etc.

Step 6: Test the function locally and then deploy it on Azure.

3. Code Examples

Example 1: An HTTP triggered function in Node.js

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

    const name = (req.query.name || (req.body && req.body.name));
    const responseMessage = name
        ? "Hello, " + name + ". This HTTP triggered function executed successfully."
        : "This HTTP triggered function executed successfully. Pass a name in the query string or in the request body for a personalized response.";

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

In this code, we are creating an HTTP triggered Azure Function. If the HTTP request has a query parameter named "name", the function responds with a personalized message. Otherwise, it responds with a default message.

4. Summary

In this tutorial, we created an Azure Function App and an HTTP triggered function. We wrote the function code and deployed it on Azure. The next step would be to explore different types of triggers and bindings in Azure Functions. You can find more information in the Azure Functions documentation.

5. Practice Exercises

Exercise 1: Create a Timer triggered Azure Function that logs a message every 5 minutes.

Solution: You can set the timer schedule to 0 */5 * * * * to trigger the function every 5 minutes. The function code will log a message.

Exercise 2: Create an HTTP triggered Azure Function that accepts two numbers in the request body and returns their sum.

Solution: You can modify the HTTP triggered function example to accept two numbers in the request body and return their sum. The function code will parse the numbers and add them.

Tips for Further Practice: Explore other types of triggers and bindings. Try to create a function that gets triggered when a new message is added to an Azure Queue.