# Utils > Standard library basic mathematical utilities.
## Usage ```javascript var utils = require( '@stdlib/math/base/utils' ); ``` #### utils Standard library basic mathematical utilities. ```javascript var o = utils; // returns {...} ```
- [`absdiff( x, y )`][@stdlib/math/base/utils/absolute-difference]: compute the absolute difference of two real numbers. - [`epsdiff( x, y[, scale] )`][@stdlib/math/base/utils/float64-epsilon-difference]: compute the relative difference of two real numbers in units of double-precision floating-point epsilon. - [`reldiff( x, y[, scale] )`][@stdlib/math/base/utils/relative-difference]: compute the relative difference of two real numbers.
## Examples ```javascript var objectKeys = require( '@stdlib/utils/keys' ); var utils = require( '@stdlib/math/base/utils' ); console.log( objectKeys( utils ) ); ```