One half times the natural logarithm of 2.
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> One half times the [natural logarithm][@stdlib/math/base/special/ln] of 2.
``bash`
npm install @stdlib/constants-float64-half-ln-two
`javascript`
var HALF_LN2 = require( '@stdlib/constants-float64-half-ln-two' );
#### HALF_LN2
One half times the [natural logarithm][@stdlib/math/base/special/ln] of 2.
`javascript`
var bool = ( HALF_LN2 === 3.46573590279972654709e-01 );
// returns true
`javascript
var HALF_LN2 = require( '@stdlib/constants-float64-half-ln-two' );
console.log( HALF_LN2 );
// => 3.46573590279972654709e-01
`
*
`c`
#include "stdlib/constants/float64/half_ln_two.h"
#### STDLIB_CONSTANT_FLOAT64_HALF_LN2
Macro for one half times the [natural logarithm][@stdlib/math/base/special/ln] of 2.
*
- [@stdlib/constants-float64/ln-two][@stdlib/constants/float64/ln-two]: natural logarithm of 2.
*
This package is part of [stdlib][stdlib], a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.
For more information on the project, filing bug reports and feature requests, and guidance on how to develop [stdlib][stdlib], see the main project [repository][stdlib].
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[@stdlib/math/base/special/ln]: https://www.npmjs.com/package/@stdlib/math-base-special-ln
[@stdlib/constants/float64/ln-two]: https://www.npmjs.com/package/@stdlib/constants-float64-ln-two