# 2π > The mathematical constant [π][@stdlib/constants/float64/pi] times 2.

## Usage ```javascript var TWO_PI = require( '@stdlib/constants/float64/two-pi' ); ``` #### TWO_PI The mathematical constant [π][@stdlib/constants/float64/pi] times `2`. ```javascript var bool = ( TWO_PI === 6.283185307179586 ); // returns true ```

## Examples ```javascript var TWO_PI = require( '@stdlib/constants/float64/two-pi' ); console.log( TWO_PI ); // => 6.283185307179586 ```

[@stdlib/constants/float64/pi]: https://www.npmjs.com/package/@stdlib/constants/tree/main/float64/pi