npm package: @stdlib/math-base-special-abs2
Description: Compute the squared absolute value of a double-precision floating-point number.
Author: The Stdlib Authors
Latest version: 0.2.3

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<details>
  <summary>
    About stdlib...
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  <p>We believe in a future in which the web is a preferred environment for numerical computation. To help realize this future, we've built stdlib. stdlib is a standard library, with an emphasis on numerical and scientific computation, written in JavaScript (and C) for execution in browsers and in Node.js.</p>
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# abs2

[![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url] <!-- [![dependencies][dependencies-image]][dependencies-url] -->

> Compute the squared [absolute value][absolute-value] of a double-precision floating-point number.

<section class="intro">

</section>

<!-- /.intro -->

<section class="installation">

## Installation

```bash
npm install @stdlib/math-base-special-abs2
```

</section>

<section class="usage">

## Usage

```javascript
var abs2 = require( '@stdlib/math-base-special-abs2' );
```

#### abs2( x )

Computes the squared [absolute value][absolute-value] of a double-precision floating-point number.

```javascript
var v = abs2( -1.0 );
// returns 1.0

v = abs2( 2.0 );
// returns 4.0

v = abs2( 0.0 );
// returns 0.0

v = abs2( -0.0 );
// returns 0.0

v = abs2( NaN );
// returns NaN
```

</section>

<!-- /.usage -->

<section class="examples">

## Examples

<!-- eslint no-undef: "error" -->

```javascript
var discreteUniform = require( '@stdlib/random-array-discrete-uniform' );
var logEachMap = require( '@stdlib/console-log-each-map' );
var abs2 = require( '@stdlib/math-base-special-abs2' );

var x = discreteUniform( 100, -50, 50, {
    'dtype': 'float64'
});

logEachMap( 'abs2(%d) = %d', x, abs2 );
```

</section>

<!-- /.examples -->

<!-- C interface documentation. -->

* * *

<section class="c">

## C APIs

<!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. -->

<section class="intro">

</section>

<!-- /.intro -->

<!-- C usage documentation. -->

<section class="usage">

### Usage

```c
#include "stdlib/math/base/special/abs2.h"
```

#### stdlib_base_abs2( x )

Computes the squared absolute value of a double-precision floating-point number.

```c
double y = stdlib_base_abs2( -5.0 );
// returns 25.0
```

The function accepts the following arguments:

-   **x**: `[in] double` input value.

```c
double stdlib_base_abs2( const double x );
```

</section>

<!-- /.usage -->

<!-- C API usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->

<section class="notes">

</section>

<!-- /.notes -->

<!-- C API usage examples. -->

<section class="examples">

### Examples

```c
#include "stdlib/math/base/special/abs2.h"
#include <stdio.h>

int main( void ) {
    const double x[] = { 3.14, -3.14, 0.0, 0.0/0.0 };

    double y;
    int i;
    for ( i = 0; i < 4; i++ ) {
        y = stdlib_base_abs2( x[ i ] );
        printf( "abs2(%lf) = %lf\n", x[ i ], y );
    }
}
```

</section>

<!-- /.examples -->

</section>

<!-- /.c -->

<!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->

<section class="related">

* * *

## See Also

-   <span class="package-name">[`@stdlib/math-base/special/abs`][@stdlib/math/base/special/abs]</span><span class="delimiter">: </span><span class="description">compute the absolute value of a double-precision floating-point number.</span>
-   <span class="package-name">[`@stdlib/math-base/special/abs2f`][@stdlib/math/base/special/abs2f]</span><span class="delimiter">: </span><span class="description">compute the squared absolute value of a single-precision floating-point number.</span>

</section>

<!-- /.related -->

<!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->


<section class="main-repo" >

* * *

## Notice

This package is part of [stdlib][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][stdlib], see the main project [repository][stdlib].

#### Community

[![Chat][chat-image]][chat-url]

---

## License

See [LICENSE][stdlib-license].


## Copyright

Copyright &copy; 2016-2026. The Stdlib [Authors][stdlib-authors].

</section>

<!-- /.stdlib -->

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[umd]: https://github.com/umdjs/umd
[es-module]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Modules

[deno-url]: https://github.com/stdlib-js/math-base-special-abs2/tree/deno
[deno-readme]: https://github.com/stdlib-js/math-base-special-abs2/blob/deno/README.md
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[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/math-base-special-abs2/main/LICENSE

[absolute-value]: https://en.wikipedia.org/wiki/Absolute_value

<!-- <related-links> -->

[@stdlib/math/base/special/abs]: https://www.npmjs.com/package/@stdlib/math-base-special-abs

[@stdlib/math/base/special/abs2f]: https://www.npmjs.com/package/@stdlib/math-base-special-abs2f

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</section>

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