题目

看时碰到的疑问,floor和ceiling
Floors and ceilings
For any real number x,we denote the greatest integer less than or equal to x by floor(x) (read "the floor of x") and the least integer greater than or equal to x by ceiling(x) (read "the ceiling of x").For all real x,
x - 1 < floor(x)

提问时间：2021-09-10

答案

floor(1) = 1,同理ceiling(1) = 1 是这样的.
1） the greatest integer less than or equal to x
2） the least integer greater than or equal to x
注意 or equal