My question is a bit similar to this discussion: use-of-as-well-in-the-beginning-of-a-sentence. However, I still didn't get a clear answer to the related problem. I want the firm answer whether it's allowed or not.
According to Merriam- Webster, there's an example when they put as well in the middle. It says:
We might as well check out some local attractions while we're in town.
As we know, Merriam-Webster always provides synonyms to the words we are looking for. And the synonym mentions also. In this case, I assume as well can be replaced by also, what's more synonymous to too.
Nevertheless, after asking this problem to my senior (a person in my English group), he said perhaps I mistakenly considered it as an idiom might as well or may as well (wich has different meaning) and conviced me if as well always goes in the end of the sentence; yet I believe that the example sentence I've quoted above is discussing about as well that synonymous with (also/too).
By the way, here's the link about idiom Might/may as well I'm talking about: idiom might may as well