# Apéry's Constant
> [Apéry's constant][apery-constant].
[Apéry's constant][apery-constant] is defined as
where `ζ(s)` is the [Riemann zeta function][@stdlib/math/base/special/riemann-zeta]
## Usage
```javascript
var APERY = require( '@stdlib/constants/float64/apery' );
```
#### APERY
[Apéry's constant][apery-constant].
```javascript
var bool = ( APERY === 1.2020569031595942 );
// returns true
```
## Examples
```javascript
var APERY = require( '@stdlib/constants/float64/apery' );
console.log( APERY );
// => 1.2020569031595942
```
[apery-constant]: https://en.wikipedia.org/wiki/Ap%C3%A9ry%27s_constant
[@stdlib/math/base/special/riemann-zeta]: https://www.npmjs.com/package/@stdlib/math-base-special-riemann-zeta
