What does the “imports on/off” switch do in golang tour?

Question

I'm following the tutorial in https://tour.golang.org/

There are some options on the top right corner of the interactive window.

Syntax On is obvious which enables/disables syntax highlighting of the code inside the window.

The other one, Imports On , which I tried to switch on/off and run the code but it doesn't seem to make a difference.

What does this option do exactly?

Answer 1

Imports On/Off enables or disables goimports .

To test out an example, remove (or add, or modify) any of the import lines in one of the examples, then click Format . This will automatically add/remove imports based on the packages used in the code.

goimports is very convenient to have as a save hook in your editor to automatically set imports for you (and cleanup, which is something that can easily be forgotten).

Answer 2

automatically imports the package you have mentioned when you hit format