Basic Rules

• We use .go files
• Code Blocks in {}
• No styling freedom
• We do have semi-colon to separate sentences
• Case-sensitive
• Strongly typed
• NOT and object-oriented language
• No classes, no exceptions
• We have on file acting as the entry point with a main function
• A folder is a package
• Packages can have simple names or URLS(github.com/fem/my-library)
• Within one go file, we can have
  • Variables
  • Functions
  • Type declarations
  • Method declarations

Modules and CLI

• A module is a group of packages
• It’s our project
• It contains a go.mod file with configuration and metadata
• CLI manipulates the module
  • go mod init
  • go build
  • go run
  • go test
  • go get

Create a GO module

go mod init shtb.dev/go/io

This will create a go.mod file inside the folder with bellow contents

module shtb.dev/go/io

go 1.21.3

To run the module we run

go run .

It will scan the folder and look for a file main.go and a function named main

Workspaces and CLI

• A workspace is a new kind of multi-module app concept from 1.18

• It contains a go.work file with configuration and metadata including whick module to use

• CLI manipulates the workspace

  • go work init