# π² > [π][@stdlib/constants/float64/pi]².

## Usage ```javascript var PI_SQUARED = require( '@stdlib/constants/float64/pi-squared' ); ``` #### PI_SQUARED Square of the mathematical constant [π][@stdlib/constants/float64/pi]. ```javascript var bool = ( PI_SQUARED === 9.869604401089358 ); // returns true ```

## Examples ```javascript var PI_SQUARED = require( '@stdlib/constants/float64/pi-squared' ); console.log( PI_SQUARED ); // => 9.869604401089358 ```

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