Each package is stored in its own folder

// denote package
package name
 
// all files in the same package have access to other items in the package
// to make functions public use a capital letter
 
func Public() {
 
} 
 
func private() {
 
}
 
package main
 
import (
	"fmt"
	"path/from/root"
)
 
func main() {
	// program is run here
}

Init function

The contents of an init() function will be run before main().

Commonly used for

Checking network connections
Checking database connections
Cache
Expensive operations