Definition of Greatest Integer Function. The greatest integer function of a real number x is represented by f(x) = [x] or |_x_|. For all real numbers x, the greatest integer function returns the largest integer less than or equal to x.
Daniel James Johnson, aka Danger Dolan, is an Australian YouTuber who specializes in trivia countdown videos narrated by animated characters.
Last name: Dolan. This interesting surname is of Irish origin, and is an anglicization of the Old Gaelic O'Dobhailein. The Gaelic prefix O indicates grandson or male descendant of, plus the personal byname Dobhailein, from dobhail meaning unlucky or unfortunate.