npm package: @stdlib/blas-base-dcabs1
Description: Compute the sum of the absolute values of the real and imaginary components of a double-precision complex floating-point number.
Author: The Stdlib Authors
Latest version: 0.0.3

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# dcabs1

[![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 sum of the [absolute values][absolute-value] of the real part and imaginary components of a double-precision [complex][@stdlib/complex/float64/ctor] floating-point number.

<section class="installation">

## Installation

```bash
npm install @stdlib/blas-base-dcabs1
```

</section>

<section class="usage">

## Usage

```javascript
var dcabs1 = require( '@stdlib/blas-base-dcabs1' );
```

#### dcabs1( z )

Computes the sum of the [absolute values][absolute-value] of the real part and imaginary components of a double-precision [complex][@stdlib/complex/float64/ctor] floating-point number.

```javascript
var Complex128 = require( '@stdlib/complex-float64-ctor' );

var y = dcabs1( new Complex128( 5.0, -3.0 ) );
// returns 8.0
```

</section>

<!-- /.usage -->

<section class="examples">

## Examples

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

```javascript
var Complex128 = require( '@stdlib/complex-float64-ctor' );
var discreteUniform = require( '@stdlib/random-base-discrete-uniform' );
var dcabs1 = require( '@stdlib/blas-base-dcabs1' );

var z;
var i;
for ( i = 0; i < 100; i++ ) {
    z = new Complex128( discreteUniform( -5, 5 ), discreteUniform( -5, 5 ) );
    console.log( 'dcabs1(%s) = %d', z.toString(), dcabs1( z ) );
}
```

</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/blas/base/dcabs1.h"
```

#### c_dcabs1( z )

Computes the sum of the [absolute values][absolute-value] of the real and imaginary components of a double-precision [complex][@stdlib/complex/float64/ctor] floating-point number.

```c
#include "stdlib/complex/float64/ctor.h"

const stdlib_complex128_t c = stdlib_complex128( 5.0, -3.0 );

double y = c_dcabs1( c );
// returns 8.0
```

The function accepts the following arguments:

-   **z**: `[in] stdlib_complex128_t` complex number.

```c
double c_dcabs1( const stdlib_complex128_t z );
```

</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/blas/base/dcabs1.h"
#include "stdlib/complex/float64/ctor.h"
#include "stdlib/complex/float64/real.h"
#include "stdlib/complex/float64/imag.h"
#include <stdio.h>

int main( void ) {
    const stdlib_complex128_t x[] = {
        stdlib_complex128( 3.14, 1.0 ),
        stdlib_complex128( -3.14, -1.0 ),
        stdlib_complex128( 0.0, 0.0 ),
        stdlib_complex128( 0.0/0.0, 0.0/0.0 )
    };

    double y;
    int i;
    for ( i = 0; i < 4; i++ ) {
        y = c_dcabs1( x[ i ] );
        printf( "f(%lf + %lf) = %lf\n", stdlib_complex128_real( x[ i ] ), stdlib_complex128_imag( 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">

</section>

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<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>

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[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/blas-base-dcabs1/main/LICENSE

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

[@stdlib/complex/float64/ctor]: https://www.npmjs.com/package/@stdlib/complex-float64-ctor

</section>

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