npm package: @stdlib/math-base-special-cflipsignf
Description: Return a single-precision complex floating-point number with the same magnitude as `z` and the sign of `y*z`.
Author: The Stdlib Authors
Latest version: 0.3.1

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# cflipsignf

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> Return a single-precision complex floating-point number with the same magnitude as `z` and the sign of `y*z`.

<!-- 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>

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<!-- Package usage documentation. -->

<section class="installation">

## Installation

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

</section>

<section class="usage">

## Usage

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

#### cflipsignf( z, y )

Returns a single-precision complex floating-point number with the same magnitude as `z` and the sign of `y*z`.

```javascript
var Complex64 = require( '@stdlib/complex-float32-ctor' );

var v = cflipsignf( new Complex64( -4.0, 5.0 ), -1.0 );
// returns <Complex64>[ 4.0, -5.0 ]
```

</section>

<!-- /.usage -->

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<section class="notes">

</section>

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<!-- Package usage examples. -->

<section class="examples">

## Examples

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

```javascript
var uniform = require( '@stdlib/random-base-uniform' ).factory;
var Complex64 = require( '@stdlib/complex-float32-ctor' );
var cflipsignf = require( '@stdlib/math-base-special-cflipsignf' );

var rand = uniform( -50.0, 50.0 );

var z;
var y;
var i;
for ( i = 0; i < 100; i++ ) {
    z = new Complex64( rand(), rand() );
    y = rand();
    console.log( 'cflipsignf(%s, %d) = %s', z, y, cflipsignf( z, y ) );
}
```

</section>

<!-- /.examples -->

<!-- C interface documentation. -->

* * *

<section class="c">

## C APIs

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</section>

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<!-- C usage documentation. -->

<section class="usage">

### Usage

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

#### stdlib_base_cflipsignf( z, y )

Returns a single-precision complex floating-point number with the same magnitude as `z` and the sign of `y*z`.

```c
#include "stdlib/complex/float32/ctor.h"
#include "stdlib/complex/float32/real.h"
#include "stdlib/complex/float32/imag.h"

stdlib_complex64_t z = stdlib_complex64( 2.5f, -1.5f );

stdlib_complex64_t out = stdlib_base_cflipsignf( z, -1.0f );

float re = stdlib_complex64_real( out );
// returns -2.5f

float im = stdlib_complex64_imag( out );
// returns 1.5f
```

The function accepts the following arguments:

-   **z**: `[in] stdlib_complex64_t` input value.
-   **y**: `[in] float` number from which to derive the sign.

```c
stdlib_complex64_t stdlib_base_cflipsignf( const stdlib_complex64_t z, const float y );
```

</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/cflipsignf.h"
#include "stdlib/complex/float32/ctor.h"
#include "stdlib/complex/float32/reim.h"
#include <stdio.h>

int main( void ) {
    const stdlib_complex64_t x[] = {
        stdlib_complex64( 3.14f, 1.5f ),
        stdlib_complex64( -3.14f, -1.5f ),
        stdlib_complex64( 0.0f, 0.0f ),
        stdlib_complex64( 0.0f/0.0f, 0.0f/0.0f )
    };

    stdlib_complex64_t v;
    stdlib_complex64_t y;
    float re1;
    float im1;
    float re2;
    float im2;
    int i;
    for ( i = 0; i < 4; i++ ) {
        v = x[ i ];
        y = stdlib_base_cflipsignf( v, -1.0f );
        stdlib_complex64_reim( v, &re1, &im1 );
        stdlib_complex64_reim( y, &re2, &im2 );
        printf( "cflipsignf(%f + %fi, %f) = %f + %fi\n", re1, im1, -1.0f, re2, im2 );
    }
}
```

</section>

<!-- /.examples -->

</section>

<!-- /.c -->

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* * *

## See Also

-   <span class="package-name">[`@stdlib/complex-float32/base/neg`][@stdlib/complex/float32/base/neg]</span><span class="delimiter">: </span><span class="description">negate a single-precision complex floating-point number.</span>
-   <span class="package-name">[`@stdlib/math-base/special/cflipsign`][@stdlib/math/base/special/cflipsign]</span><span class="delimiter">: </span><span class="description">return a double-precision complex floating-point number with the same magnitude as `z` and the sign of `y*z`.</span>

</section>

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* * *

## 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].

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---

## License

See [LICENSE][stdlib-license].


## Copyright

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

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