Import internal packages in Go by adding their full module-relative path to the import block.
Use the import statement to include internal packages by specifying their full path relative to your module root. The Go compiler automatically resolves these paths as long as the package is within the same module and not exported to the public.
import (
"your/module/path/internal/package"
)
Internal packages are like private rooms in a house; only people inside the house (your module) can enter them. You use them by simply stating their location in your code, just like you would for any other package. This keeps your helper code hidden from the outside world while still letting your main program use it.