# Cube Root of Epsilon > [Cube root][@stdlib/math/base/special/cbrt] of [half-precision floating-point epsilon][@stdlib/constants/float16/eps].
## Usage ```javascript var FLOAT16_CBRT_EPSILON = require( '@stdlib/constants/float16/cbrt-eps' ); ``` #### FLOAT16_CBRT_EPSILON [Cube root][@stdlib/math/base/special/cbrt] of [half-precision floating-point epsilon][@stdlib/constants/float16/eps]. ```javascript var bool = ( FLOAT16_CBRT_EPSILON === 0.09921256574801247 ); // returns true ```
## Examples ```javascript var abs = require( '@stdlib/math/base/special/abs' ); var maxabs = require( '@stdlib/math/base/special/maxabs' ); var randu = require( '@stdlib/random/base/randu' ); var FLOAT16_CBRT_EPSILON = require( '@stdlib/constants/float16/cbrt-eps' ); var bool; var a; var b; var i; function isApprox( a, b ) { var delta; var tol; delta = abs( a - b ); tol = FLOAT16_CBRT_EPSILON * maxabs( a, b ); return ( delta <= tol ); } for ( i = 0; i < 100; i++ ) { a = randu() * 10.0; b = a + randu() - 0.5; bool = isApprox( a, b ); console.log( '%d %s approximately equal to %d', a, ( bool ) ? 'is' : 'is not', b ); } ```