## CEIL Ceiling Function

Section: Elementary Functions

### Usage

Computes the ceiling of an n-dimensional array elementwise. The ceiling of a number is defined as the smallest integer that is larger than or equal to that number. The general syntax for its use is

       y = ceil(x)

where `x` is a multidimensional array of numerical type. The `ceil` function preserves the type of the argument. So integer arguments are not modified, and `float` arrays return `float` arrays as outputs, and similarly for `double` arrays. The `ceil` function is not defined for `complex` or `dcomplex` types.

### Example

The following demonstrates the `ceil` function applied to various (numerical) arguments. For integer arguments, the ceil function has no effect:

    --> ceil(3)

    ans =

     3

    --> ceil(-3)

    ans =

     -3

    -->
    quit

Next, we take the `ceil` of a floating point value:

    --> ceil(3.023f)

    ans =

     4

    --> ceil(-2.341f)

    ans =

     -2

    -->
    quit

Note that the return type is a `float` also. Finally, for a `double` type:

    --> ceil(4.312)

    ans =

     5

    --> ceil(-5.32)

    ans =

     -5

    -->
    quit