Exercise 09.01 – creating and using your first module

In this exercise, we will see how to create our first Go module with ease:

1. Create a new directory called bookutil and navigate into it:

   mkdir bookutil
   cd bookutil

2. Initialize a Go module named bookutil:

   go mod init bookutil

3. Verify that go.mod is created within your project directory with the module path set as bookutil.

Note

No go.sum file is created after running go mod init. It will be generated and updated as you interact with your module and add to its dependencies.

4. Now, let’s create a Go package for the author information while focusing on functions related to book chapters by creating a directory named author within our module’s project directory.
5. Inside the author directory, create a file named author.go to define the package and functions.

   Here is the starting code for author.go:

   package author
   import "fmt"
   // Author represents an author of a book.
   type Author...