Return the data type of a complex number.
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> Return the data type of a complex number.
``bash`
npm install @stdlib/complex-dtype
`javascript`
var dtype = require( '@stdlib/complex-dtype' );
#### dtype( value )
Returns the [data type][@stdlib/complex/dtypes] of a complex number.
`javascript
var Complex128 = require( '@stdlib/complex-float64-ctor' );
var dt = dtype( new Complex128( 1.0, 2.0 ) );
// returns 'complex128'
`
If provided an argument having an unknown or unsupported [data type][@stdlib/complex/dtypes], the function returns null.
`javascript`
var dt = dtype( 'beep' );
// returns null
`javascript
var dtypes = require( '@stdlib/complex-dtypes' );
var ctors = require( '@stdlib/complex-ctors' );
var dtype = require( '@stdlib/complex-dtype' );
// Get a list of supported complex number data types:
var DTYPES = dtypes();
// For each supported data type, create a complex number and confirm its data type...
var ctor;
var dt;
var i;
for ( i = 0; i < DTYPES.length; i++ ) {
ctor = ctors( DTYPES[ i ] );
dt = dtype( new ctor( 1.0, 2.0 ) );
console.log( '%s == %s => %s', DTYPES[ i ], dt, DTYPES[ i ] === dt );
}
`
*
- [@stdlib/array-dtype][@stdlib/array/dtype]: return the data type of an array.
*
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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---
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Copyright © 2016-2026. The Stdlib [Authors][stdlib-authors].
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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/complex-dtype/tree/deno
[deno-readme]: https://github.com/stdlib-js/complex-dtype/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/complex-dtype/tree/umd
[umd-readme]: https://github.com/stdlib-js/complex-dtype/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/complex-dtype/tree/esm
[esm-readme]: https://github.com/stdlib-js/complex-dtype/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/complex-dtype/blob/main/branches.md
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[@stdlib/complex/dtypes]: https://www.npmjs.com/package/@stdlib/complex-dtypes
[@stdlib/array/dtype]: https://www.npmjs.com/package/@stdlib/array-dtype