include a secondary file in main go file

Question

I have a main.go file that I worked on and now I'm trying to organize since it became a little lengthy. I want to create a new file, put some functions in it and then include it in main.go and use those functions. That new file will be in the same directory as main.go. Anybody have any idea how to do this?

Answer 1

As long as the go files are in the same package, you do not need to import anything.

Example:

project/main.go:

package main

import "fmt"

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

project/utils.go:

package main

func sayHello() (string) {
    return "hello!"
}

To run: go run main.go utils.go or go run *.go

Answer 2

You don't have to do any including (importing). Just use the same package name in both files.