# Constants > 8-bit unsigned integer mathematical constants.
## Usage ```javascript var constants = require( '@stdlib/constants/uint8' ); ``` #### constants 8-bit unsigned integer mathematical constants. ```javascript var c = constants; // returns {...} ```
- [`MAX`][@stdlib/constants/uint8/max]: maximum unsigned 8-bit integer. - [`NUM_BYTES`][@stdlib/constants/uint8/num-bytes]: size (in bytes) of an 8-bit unsigned integer.
## Examples ```javascript var objectKeys = require( '@stdlib/utils/keys' ); var constants = require( '@stdlib/constants/uint8' ); console.log( objectKeys( constants ) ); ```