# Hello World

## Basic Syntax

Package fmt implements formatted I/O with functions analogous to C's printf and scanf.

// Returns the resulting string
fmt.Sprintf("Hello, %s!", name)

os.Args provides access to raw command-line arguments.

if len(os.Args) > 1 {
		fmt.Println(SayHello(os.Args[1]))
	}

## Unit Test

If we want to write a unit test for out method, we have to import "testing".

import (
	"testing"
)

## Project Structure

Another way to deal with the Go module if we want to reuse the hello lib.

/project-root
  /src
    /helloworld
      main.go
  /pkg
    /hello
      hello.go
  go.mod

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Next: [Go - 02 - Basic Types](https://hackmd.io/fQlaEGGlThG-53EOpZAL7g)