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.
Dornan was born in Holywood, County Down, Northern Ireland. He grew up in the suburbs of Belfast, and has two older sisters, Liesa, who works in London for Disney, and Jessica, a fashion designer based in Falmouth, England.