npm package: @stdlib/complex-cmplx
Description: Create a complex number.
Author: The Stdlib Authors
Latest version: 0.2.3

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# Complex Numbers

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

> Create a complex number.

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<section class="installation">

## Installation

```bash
npm install @stdlib/complex-cmplx
```

</section>

<section class="usage">

## Usage

```javascript
var complex = require( '@stdlib/complex-cmplx' );
```

#### complex( real, imag\[, dtype] )

Creates a complex number, where `real` and `imag` are the **real** and **imaginary** components, respectively.

```javascript
var z = complex( 5.0, 3.0 );
// returns <Complex128>
```

By default, the function returns a [128-bit complex number][@stdlib/complex/float64/ctor]. To specify an alternative underlying data type, set the `dtype` parameter to one of the following:

-   [`'float64'`][@stdlib/complex/float64/ctor]: store **real** and **imaginary** components as double-precision floating-point numbers.
-   [`'float32'`][@stdlib/complex/float32/ctor]: store **real** and **imaginary** components as single-precision floating-point numbers.

```javascript
var z = complex( 5.0, 3.0, 'float32' );
// returns <Complex64>
```

</section>

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<section class="examples">

## Examples

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

```javascript
var discreteUniform = require( '@stdlib/random-base-discrete-uniform' ).factory;
var complex = require( '@stdlib/complex-cmplx' );

var rand = discreteUniform( -50, 50 );

var z;
var i;
for ( i = 0; i < 100; i++ ) {
    z = complex( rand(), rand(), 'float64' );
    console.log( z.toString() );
}
```

</section>

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* * *

## See Also

-   <span class="package-name">[`@stdlib/complex-float64/ctor`][@stdlib/complex/float64/ctor]</span><span class="delimiter">: </span><span class="description">128-bit complex number.</span>
-   <span class="package-name">[`@stdlib/complex-float32/ctor`][@stdlib/complex/float32/ctor]</span><span class="delimiter">: </span><span class="description">64-bit complex number.</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].

#### Community

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---

## License

See [LICENSE][stdlib-license].


## Copyright

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

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[npm-image]: http://img.shields.io/npm/v/@stdlib/complex-cmplx.svg
[npm-url]: https://npmjs.org/package/@stdlib/complex-cmplx

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

[@stdlib/complex/float32/ctor]: https://www.npmjs.com/package/@stdlib/complex-float32-ctor

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