Overview

The struct name in another package must start with a capital letter so that it is public outside its package. If the struct name starts with lowercase then it will not be visible outside its package.

To access a struct outside its package we need to import the package first which contains that struct.

Program

Here is the code for the same

go.mod

module sample.com/learn
go 1.16

model/person.go

package model
type Person struct {
    Name string
}

main.go

package main
import (
    "fmt"
    "sample.com/learn/person"
)
func main() {
    p := &model.Person{
        Name: "John",
    }
    fmt.Println(p.Name)
}

In this program, we first import the model package from the main package as below.

"sample.com/learn/model"

Then we access the Person struct as below from the main package

p := &model.Person{
   Name: "John",
}

This works because Person struct name is in uppercase.

Let’s change the struct name to lower case and run this program. It gives the below compilation error

cannot refer to unexported name model.person

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