Is it necessary to add a comma before 'too'?

Question

Copied over from the writers site. As in these two examples: They all wished to have one too. They all wished to have one, too. Perhaps what makes comma usage in these examples is that, in speech utterances, there may be pauses where there shouldn't be in writing, and vice versa. I saw a similar question using 'though' as the example.

Answer 1

When "too" is at the end of a sentence, a comma before it isn't necessary. However, you can use a comma there to emphasize a pause if you wish. It depends on how you would like your sentence to sound.

Answer 2

Yes, a comma should be included. It would also be included if the word was "also" instead of "too".