How to create a package with Golang

Init it

go mod init github.com/yingshaoxo/my_package

Create a sub module

mkdir sub_module_folder
cd sub_module_folder
touch sub_module_file.go

# sub_module_file.go

package sub_module

import "fmt"

func Print_something() {
    fmt.Println("yingshaoxo is something!")
}

Import and use it in the main package

cd ..
touch main.go

# main.go

package main

import (
    sub_module "github.com/yingshaoxo/my_package/sub_module_folder"
)

func main() {
    sub_module.Print_something()
}

Run it 

go run main.go

More info and example

https://github.com/yingshaoxo/minimum-golang-package-layout

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