# Quick start
Create an empty file, let's assume its name is `example.go`, then open it and copy-paste the below code.
```go
package main
import "github.com/kataras/iris/v12"
type PingResponse struct {
Message string `json:"message"`
}
func main() {
app := iris.New()
app.Use(myMiddleware)
app.Get("/ping", func(ctx iris.Context) {
res := PingResponse{
Message: "pong",
}
ctx.JSON(res)
})
/* Same as:
app.Handle("GET", "/ping", func(ctx iris.Context) {
ctx.JSON(iris.Map{
"message": "pong",
})
})
*/
// Listens and serves incoming http requests
// on http://localhost:8080.
app.Listen(":8080")
}
func myMiddleware(ctx iris.Context) {
ctx.Application().Logger().Infof("Runs before %s", ctx.Path())
ctx.Next()
}
```
Start a terminal session and execute the following.
```bash
# run example.go and visit http://localhost:8080/ping on browser
$ go mod tidy
$ go run example.go
```
## Show me more!
Let's take a small overview of how easy is to get up and running.
```go
package main
import "github.com/kataras/iris/v12"
func main() {
app := iris.New()
// Load all templates from the "./views" folder
// where extension is ".html" and parse them
// using the standard `html/template` package.
app.RegisterView(iris.HTML("./views", ".html"))
// Method: GET
// Resource: http://localhost:8080
app.Get("/", func(ctx iris.Context) {
// Bind: {{.message}} with "Hello world!"
ctx.ViewData("message", "Hello world!")
// Render template file: ./views/hello.html
ctx.View("hello.html")
})
// Method: GET
// Resource: http://localhost:8080/user/42
//
// Need to use a custom regexp instead?
// Easy;
// Just mark the parameter's type to 'string'
// which accepts anything and make use of
// its `regexp` macro function, i.e:
// app.Get("/user/{id:string regexp(^[0-9]+$)}")
app.Get("/user/{id:uint64}", func(ctx iris.Context) {
userID, _ := ctx.Params().GetUint64("id")
ctx.Writef("User ID: %d", userID)
})
// Start the server using a network address.
app.Listen(":8080")
}
```
```markup
Hello Page
{{.message}}
```
> Wanna re-start your app automatically when source code changes happens? Install the [iris-cli](https://github.com/kataras/iris-cli) tool and execute `iris-cli run` instead of `go run main.go`.
At the next section we will learn more about [Routing](/iris/contents/routing.md).
---
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