Introduction

Golang is a programming language that is known for its speed, simplicity, and concurrency. It is a popular choice for building web applications and APIs.

Gorilla mux is a web framework for Golang that is known for its performance, flexibility, and ease of use. It is a popular choice for building web applications and APIs.

In this blog post, we will learn how to use Golang and gorilla mux to build a simple web application.

Prerequisites

Before we begin, we need to make sure that we have the following prerequisites installed:

• Golang: You can download Golang from the official website.
• gorilla mux: You can install gorilla mux with the following command:

go get github.com/gorilla/mux

Creating a new project Once we have the prerequisites installed, we can create a new project. We can do this with the following command:

bash ``` mkdir my-golang-app

cd my-golang-app

This will create a new directory called my-golang-app. We will be working in this directory for the rest of the tutorial.

Creating a main.go file
Now that we have created a new project, we need to create a main.go file. This file will contain the code for our web application.

go```
package main

import (
  "fmt"
  "net/http"
  "github.com/gorilla/mux"
)

func main() {
  // Create a new mux router.
  r := mux.NewRouter()

  // Handle the "/" path.
  r.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
    fmt.Fprintf(w, "Hello, world!")
  })

  // Listen and serve on port 8080.
  http.ListenAndServe(":8080", r)
}

This code creates a new mux router and registers a handler for the "/" path. The handler simply prints "Hello, world!" to the response writer.

Starting the server

Now that we have created a web application, we can start the server. We can do this with the following command:

bash ``` go run main.go

### This will start the server on port 8080. We can open a web browser and go to http://localhost:8080 to see our web application.

## Conclusion

In this blog post, we learned how to use Golang and gorilla mux to build a simple web application. We created a new project, created a main.go file, and started the server. We can now open a web browser and see our web application.