# 1/4 times π > One fourth times the mathematical constant [π][pi].

## Usage ```javascript var FOURTH_PI = require( '@stdlib/constants/float64/fourth-pi' ); ``` #### FOURTH_PI One fourth times the mathematical constant [π][pi]. ```javascript var bool = ( FOURTH_PI === 7.85398163397448309616e-1 ); // returns true ```

## Examples ```javascript var FOURTH_PI = require( '@stdlib/constants/float64/fourth-pi' ); console.log( FOURTH_PI ); // => 7.85398163397448309616e-1 ```

[pi]: https://en.wikipedia.org/wiki/Pi