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# Data Types

> List of ndarray data types.

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</section>

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<section class="usage">

## 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 [...]
```

<!-- NOTE: keep the following in alphabetical order -->

#### 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 <DataType>
```

#### 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 <DataType>
```

#### 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 <DataType>
```

#### 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 <DataType>
```

#### 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 <DataType>
```

#### 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 <DataType>
```

#### 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 <DataType>
```

#### 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 <DataType>
```

#### 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 <DataType>
```

#### 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 <DataType>
```

#### 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 <DataType>
```

#### 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 <DataType>
```

#### 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 <DataType>
```

#### 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 <DataType>
```

#### 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 <DataType>
```

#### 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 <DataType>
```

</section>

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</section>

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## Examples

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```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
```

</section>

<!-- /.examples -->

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</section>

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<section class="related">

* * *

## See Also

-   <span class="package-name">[`@stdlib/array/dtypes`][@stdlib/array/dtypes]</span><span class="delimiter">: </span><span class="description">list of array data types.</span>
-   <span class="package-name">[`@stdlib/ndarray/array`][@stdlib/ndarray/array]</span><span class="delimiter">: </span><span class="description">multidimensional arrays.</span>
-   <span class="package-name">[`@stdlib/ndarray/ctor`][@stdlib/ndarray/ctor]</span><span class="delimiter">: </span><span class="description">multidimensional array constructor.</span>
-   <span class="package-name">[`@stdlib/array/typed-dtypes`][@stdlib/array/typed-dtypes]</span><span class="delimiter">: </span><span class="description">list of typed array data types.</span>

</section>

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[@stdlib/ndarray/dtype-ctor]: https://github.com/stdlib-js/ndarray/tree/main/dtype-ctor

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[@stdlib/array/dtypes]: https://www.npmjs.com/package/@stdlib/array-dtypes

[@stdlib/ndarray/array]: https://github.com/stdlib-js/ndarray/tree/main/array

[@stdlib/ndarray/ctor]: https://github.com/stdlib-js/ndarray/tree/main/ctor

[@stdlib/array/typed-dtypes]: https://www.npmjs.com/package/@stdlib/array-typed-dtypes

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</section>

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