Too/also /not-either

The corresponding negative expression to the adverb
også (too, also) is heller ikke (not – either):

Jeg liker kaffe. Jeg liker te også.
I like coffee. I also like tea.

Jeg liker ikke kaffe. Jeg liker heller ikke te / Jeg liker ikke te heller.
I do not like coffee. I do not like tea, either.