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# PI

The mathematical constant π.

## Installation

`npm install @stdlib/constants-float64-pi`

## Usage

`var PI = require( '@stdlib/constants-float64-pi' );`

#### PI

The mathematical constant π.

```
var bool = ( PI === 3.141592653589793 );
// returns true
```

## Examples

```
var PI = require( '@stdlib/constants-float64-pi' );
console.log( PI );
// => 3.141592653589793
```

## C APIs

### Usage

`#include "stdlib/constants/float64/pi.h"`

#### STDLIB_CONSTANT_FLOAT64_PI

Macro for the mathematical constant π.

## See Also

## Notice

This package is part of stdlib, a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.

#### Community

## License

See LICENSE.

## Copyright

Copyright © 2016-2023. The Stdlib Authors.