Go Exports - mdawar.dev

An identifier may be exported to permit access to it from another package.

An identifier is exported only if:

The first character of its name is an uppercase letter
It is declared in the package block or it is a field name or method name

package example

// Identifiers that start with an uppercase letter are exported.
// They can be referred to when the package is imported.
var ExportedVariable int = 10

// This variables is not exported and cannot be referenced.
// Only accessible in the declaring package.
var localVariable string = "Hello World!"

// Exported function.
func Hello() string {
  return localVariable
}

Using the exported identifiers:

package main

import (
  "fmt"
  "example"
)

func main() {
  // Access an exported variable.
  fmt.Println(example.ExportedVariable)

  // Access an exported function.
  fmt.Println(example.Hello())
}

Go - Exports