Education Technology

# Knowledge Base

## Solution 32811: Using the Ceiling() Function on the TI-Nspire™ Family Products.

### How do I use the ceiling() function on the TI-Nspire family products?

The ceiling() function returns the nearest integer that is greater than or equal to its argument. The argument can be a real number, complex number, list, or matrix.

To perform this function, please see the examples listed below.

Example 1: Using an Integer (0.456):

1) Press [home].
3) Press [catalog] which is the button with the picture of the open book.
4) On the first tab, press [C], scroll to ceiling(, and press [enter].

5) Input [0] [.] [4] [5] [6] in the parenthesis next to ceiling and press [enter].
6) It will return 1 as the answer.

Example 2: Using a List ({-3.1, 1, 2.5})

1) Press [home].
3) Press [catalog] which is the button with the picture of the open book.
4) On the first tab, press [C], scroll to ceiling(, and press [enter].
5) Input [ctrl] [{ }] [(-)] [3] [.] [1] [,] [1] [,] [2] [.] [5] in the parenthesis next to ceiling and press [enter].
6) The displayed answer will show {-3,1, 3}

Example 3: Using a Matrix ([0,-3.2i; 1.3, 4])

1) Press [home].