# Natural Logarithm of 2π > [Natural logarithm][@stdlib/math/base/special/ln] of `2π`.

## Usage ```javascript var LN_TWO_PI = require( '@stdlib/constants/float64/ln-two-pi' ); ``` #### LN_TWO_PI [Natural logarithm][@stdlib/math/base/special/ln] of `2π`. ```javascript var bool = ( LN_TWO_PI === 1.8378770664093456 ); // returns true ```

## Examples ```javascript var LN_TWO_PI = require( '@stdlib/constants/float64/ln-two-pi' ); console.log( LN_TWO_PI ); // => 1.8378770664093456 ```

[@stdlib/math/base/special/ln]: https://www.npmjs.com/package/@stdlib/math-base-special-ln