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# Data Types [![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url] > List of ndarray data types.
## Installation ```bash npm install @stdlib/ndarray-dtypes ```
## Usage ```javascript var dtypes = require( '@stdlib/ndarray-dtypes' ); ``` #### dtypes( \[kind] ) Returns a list of ndarray data type strings. ```javascript var out = dtypes(); // e.g., returns [ 'binary', 'complex32', 'complex64', 'complex128', ... ] ``` When not provided a data type "kind", the function returns an array containing the following data type strings: - `binary`: binary. - `bool`: boolean values. - `complex32`: half-precision complex floating-point numbers. - `complex64`: single-precision complex floating-point numbers. - `complex128`: double-precision complex floating-point numbers. - `float16`: half-precision floating-point numbers. - `float32`: single-precision floating-point numbers. - `float64`: double-precision floating-point numbers. - `generic`: values of any type. - `int8`: signed 8-bit integers. - `int16`: signed 16-bit integers. - `int32`: signed 32-bit integers. - `uint8`: unsigned 8-bit integers. - `uint8c`: unsigned clamped 8-bit integers. - `uint16`: unsigned 16-bit integers. - `uint32`: unsigned 32-bit integers. To return the subset of data type strings belonging to a specified data type kind, provide a `kind` argument. ```javascript var out = dtypes( 'floating_point' ); // returns [...] ``` The function supports the following data type kinds: - `floating_point`: floating-point data types. - `real_floating_point`: real-valued floating-point data types. - `complex_floating_point`: complex-valued floating-point data types. - `boolean`: boolean data types. - `integer`: integer data types. - `signed_integer`: signed integer data types. - `unsigned_integer`: unsigned integer data types. - `real`: real-valued data types. - `numeric`: numeric data types. - `typed`: typed data types. - `integer_index`: integer index data types. - `boolean_index`: boolean index data types. - `mask_index`: mask index data types. - `typed_index`: typed index data types. - `index`: index data types. - `all`: all data types. Additionally, the function supports extending the "kinds" listed above by appending an `_and_generic` suffix to the kind name (e.g., `real_and_generic`). ```javascript var out = dtypes( 'floating_point_and_generic' ); // returns [...] ``` #### dtypes.binary **Read-only** property returning a [data type][@stdlib/ndarray/dtype-ctor] instance representing a binary data type. ```javascript var dt = dtypes.binary; // returns ``` #### dtypes.bool **Read-only** property returning a [data type][@stdlib/ndarray/dtype-ctor] instance representing a boolean data type. ```javascript var dt = dtypes.bool; // returns ``` #### dtypes.complex32 **Read-only** property returning a [data type][@stdlib/ndarray/dtype-ctor] instance representing a half-precision complex floating-point number data type. ```javascript var dt = dtypes.complex32; // returns ``` #### dtypes.complex64 **Read-only** property returning a [data type][@stdlib/ndarray/dtype-ctor] instance representing a single-precision complex floating-point number data type. ```javascript var dt = dtypes.complex64; // returns ``` #### dtypes.complex128 **Read-only** property returning a [data type][@stdlib/ndarray/dtype-ctor] instance representing a double-precision complex floating-point number data type. ```javascript var dt = dtypes.complex128; // returns ``` #### dtypes.float16 **Read-only** property returning a [data type][@stdlib/ndarray/dtype-ctor] instance representing a half-precision real-valued floating-point number data type. ```javascript var dt = dtypes.float16; // returns ``` #### dtypes.float32 **Read-only** property returning a [data type][@stdlib/ndarray/dtype-ctor] instance representing a single-precision real-valued floating-point number data type. ```javascript var dt = dtypes.float32; // returns ``` #### dtypes.float64 **Read-only** property returning a [data type][@stdlib/ndarray/dtype-ctor] instance representing a double-precision real-valued floating-point number data type. ```javascript var dt = dtypes.float64; // returns ``` #### dtypes.generic **Read-only** property returning a [data type][@stdlib/ndarray/dtype-ctor] instance representing a "generic" data type. ```javascript var dt = dtypes.generic; // returns ``` #### dtypes.int8 **Read-only** property returning a [data type][@stdlib/ndarray/dtype-ctor] instance representing a signed 8-bit integer data type. ```javascript var dt = dtypes.int8; // returns ``` #### dtypes.int16 **Read-only** property returning a [data type][@stdlib/ndarray/dtype-ctor] instance representing a signed 16-bit integer data type. ```javascript var dt = dtypes.int16; // returns ``` #### dtypes.int32 **Read-only** property returning a [data type][@stdlib/ndarray/dtype-ctor] instance representing a signed 32-bit integer data type. ```javascript var dt = dtypes.int32; // returns ``` #### dtypes.uint8 **Read-only** property returning a [data type][@stdlib/ndarray/dtype-ctor] instance representing an unsigned 8-bit integer data type. ```javascript var dt = dtypes.uint8; // returns ``` #### dtypes.uint8c **Read-only** property returning a [data type][@stdlib/ndarray/dtype-ctor] instance representing an unsigned clamped 8-bit integer data type. ```javascript var dt = dtypes.uint8c; // returns ``` #### dtypes.uint16 **Read-only** property returning a [data type][@stdlib/ndarray/dtype-ctor] instance representing an unsigned 16-bit integer data type. ```javascript var dt = dtypes.uint16; // returns ``` #### dtypes.uint32 **Read-only** property returning a [data type][@stdlib/ndarray/dtype-ctor] instance representing an unsigned 32-bit integer data type. ```javascript var dt = dtypes.uint32; // returns ```
## Examples ```javascript var contains = require( '@stdlib/array-base-assert-contains' ).factory; var dtypes = require( '@stdlib/ndarray-dtypes' ); var isdtype = contains( dtypes() ); var bool = isdtype( 'float64' ); // returns true bool = isdtype( 'int16' ); // returns true bool = isdtype( 'uint8' ); // returns true bool = isdtype( 'beep' ); // returns false ```
* * * ## See Also - [`@stdlib/array-dtypes`][@stdlib/array/dtypes]: list of array data types. - [`@stdlib/ndarray-array`][@stdlib/ndarray/array]: multidimensional arrays. - [`@stdlib/ndarray-ctor`][@stdlib/ndarray/ctor]: multidimensional array constructor. - [`@stdlib/array-typed-dtypes`][@stdlib/array/typed-dtypes]: list of typed array data types.
* * * ## 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 © 2016-2026. The Stdlib [Authors][stdlib-authors].
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