# Natural Logarithm of Square Root 2π > [Natural logarithm][@stdlib/math/base/special/ln] of the [square root][@stdlib/math/base/special/sqrt] of [2π][@stdlib/constants/float64/pi].

## Usage ```javascript var LN_SQRT_TWO_PI = require( '@stdlib/constants/float64/ln-sqrt-two-pi' ); ``` #### LN_SQRT_TWO_PI [Natural logarithm][@stdlib/math/base/special/ln] of the [square root][@stdlib/math/base/special/sqrt] of [2π][@stdlib/constants/float64/pi]. ```javascript var bool = ( LN_SQRT_TWO_PI === 0.9189385332046728 ); // returns true ```

## Examples ```javascript var LN_SQRT_TWO_PI = require( '@stdlib/constants/float64/ln-sqrt-two-pi' ); console.log( LN_SQRT_TWO_PI ); // => 0.9189385332046728 ```

[@stdlib/constants/float64/pi]: https://www.npmjs.com/package/@stdlib/constants/tree/main/float64/pi [@stdlib/math/base/special/ln]: https://www.npmjs.com/package/@stdlib/math-base-special-ln [@stdlib/math/base/special/sqrt]: https://www.npmjs.com/package/@stdlib/math-base-special-sqrt