# Documentation

### This is machine translation

Translated by
Mouseover text to see original. Click the button below to return to the English version of the page.

Note: This page has been translated by MathWorks. Click here to see
To view all translated materials including this page, select Country from the country navigator on the bottom of this page.

# uint8

8-bit unsigned integer arrays

## Description

Variables in MATLAB® of data type (class) `uint8` are stored as 1-byte (8-bit) unsigned integers. For example:

```y = uint8(10); whos y```
``` Name Size Bytes Class Attributes y 1x1 1 uint8 ```

For more information on integer types, see Integers.

## Creation

Some array creation functions allow you to specify the data type. For instance, `zeros(100,'uint8')` creates a 100-by-100 matrix of zeros of type `uint8`.

If you have an array of a different type, such as `double` or `single`, then you can convert that array to an array of type `uint8` by using the `uint8` function.

### Syntax

``Y = uint8(X)``

### Description

example

````Y = uint8(X)` converts the values in `X` to type `uint8`. Values outside the range [0,28-1] map to the nearest endpoint.```

### Input Arguments

expand all

Input array, specified as a scalar, vector, matrix, or multidimensional array.

Data Types: `double` | `single` | `int8` | `int16` | `int32` | `int64` | `uint16` | `uint32` | `uint64` | `logical` | `char`

## Examples

collapse all

Convert a double-precision variable to an 8-bit unsigned integer.

```x = 100; xtype = class(x)```
```xtype = 'double' ```
`y = uint8(x)`
```y = uint8 100 ```

## See Also

### Topics

#### Introduced before R2006a

Was this topic helpful?

#### The Manager's Guide to Solving the Big Data Conundrum

Download white paper