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Dec 29, 2020 • 2 min read

Hello World in Go

The Go programming language is an open source project to make programmers more productive.
In the following blog post I assume you already have the Go environment setup. To get started with Go is just a matter of adding some code. The example below covers a basic “Hello World”.

Go Installation

Confirm Go is installed
NODE_TYPE // bash
```
go version
```

If it is not installed check out a previous post to install Go in Linux

Development setup

With go already installed, the setup requires a couple more steps

Create a directory for your code
Initialise the location where the module can be found

Make the go home directory
NODE_TYPE // bash
```
mkdir -p ~/hello && cd hello
```
Initialise the hello directory
NODE_TYPE // bash
```
go mod init example.com/hello
```
The directory should now look like this:
NODE_TYPE // text
```
.
└── go.mod
```

Hello World

In the hello world example we will perform three things

Declare a package name
Import the “fmt” package to use the fmt.Println function
Declare a main func - which is the entry point for our go application

Create a hello.go program using an editor e.g.
NODE_TYPE // bash
```
vi hello.go
```
Add the following code to hello.go
NODE_TYPE // go
```
package main
import "fmt"
func main() {
  fmt.Println("hello, world\n")
}
```
The directory should now look like this:
NODE_TYPE // bash
```
.
├── go.mod
└── hello.go
```

Build go

The last thing to do is build our application and run it.

Build the hello.go application
NODE_TYPE // bash
```
go build
```
The directory should now look like this:
NODE_TYPE // bash
```
.
├── go.mod
├── hello
└── hello.go
```
Run the code hello application
NODE_TYPE // bash
```
./hello
```
The application output should be as per below:
NODE_TYPE // bash
```
hello, world
```