How to type blank character with Mac keyboard?

One can type blank character (no visible output but not Space) with Alt+255 on the numpad.

I want to know how to type blank text in Mac.

• Those are not blanktext but another form of space - what is the end result you need? – user151019 Nov 7 '13 at 9:44

Alt+255 is a non-breakable space (well known as &nbsp; in HTML).