How to include another file in golang?

Question

go

Tell me, maybe a banal question, how to connect another file in golang?
I just started experimenting with it and so far I am writing in one file.
I would like to transfer part of the code to another and connect it to main.go

Answer 1

For beginners, there are two articles that are required reading. The first is " How to Write Go Code " and the second is " Understanding Golang Packages "
In short, Go doesn't include a file, but imports a module (package of files).
main.go:

package main

import "./mymodule"

func main() {
    mymodule.MethodOne()
}

mymodule/some_file.go:

package mymodule

import "fmt"

func MethodOne() {
    fmt.Println("Hello World!")
}

But this is an example of a relative import, without regard to the $GOPATH environment variable. For more details, see the links above.

Answer 2

Please tell me, did you search for the answer to this question in Google?
https://golang.org/doc/code.html

Answer 3

Suppose we have a hello.go file with the following content

package main

import "fmt"

const(
 constString="Hello, constant!"
)

func main() {
    fmt.Println(constString)
}

will result in
I just want to move all the constant definitions to another file, staying within the same package, without having to practice importing packages and exporting names.
In the same directory I create a file myConst.go with the following content

package main // Это важно!

const(
 constString="Hello, constant!"
)

In the hello.go file, I delete the line with the declaration of the constant

package main

import "fmt"

func main() {
    fmt.Println(constString)
}

If everything is done correctly, then the output will be the same as in the original example.