# 07. Go Playground

{% hint style="info" %}
 The Go Playground is a web service that runs on [golang.org](https://golang.org/)'s servers.
{% endhint %}

We can use Go playground to edit and run simple Go programs. Head to playground at : <https://play.golang.org/>&#x20;

Delete existing code and type in below code manually. (Remember programming is all about muscle memory!)

{% code title="hello.go" %}

```go
package main

import "fmt"

func main() {
	fmt.Println("Hello, Pune!")
}

```

{% endcode %}

Let's understand how this code works:

{% hint style="success" %}
Every Go program starts execution from *main()*
{% endhint %}

```go
func main(){}
```

Main is the signal to compiler to start execution of code from *here.* This is entry point of our application.

{% hint style="success" %}
Every Go program should be part of a package
{% endhint %}

```go
package main
```

This declares that our program is part of package "main". Packages are used to bundle similar code that can be reused easily.

{% hint style="success" %}
Go program can use external packages using import
{% endhint %}

```go
import "fmt"
```

We are importing **fmt** package using import statement. Compiler will find this package and import in our program before we can use it.

We are using **Println** method from **fmt** package to print output to console. How to print output to console is implemented by fmt package, we do not have to write (re-write!) code to do it!