@stdlib/array/dtype/README.md

Arrays.

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# Data Type

> Return the data type of an array.

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## Usage

```javascript
var dtype = require( '@stdlib/array/dtype' );
```

#### dtype( array )

Returns the [data type][@stdlib/array/dtypes] of an `array`.

```javascript
var Float64Array = require( '@stdlib/array/float64' );
var arr = new Float64Array( 10 );

var dt = dtype( arr );
// returns 'float64'
```

If provided an argument having an unknown or unsupported [data type][@stdlib/array/dtypes], the function returns `null`.

```javascript
var dt = dtype( 'beep' );
// returns null
```

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## Examples

<!-- eslint-disable stdlib/new-cap-error -->

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

```javascript
var dtypes = require( '@stdlib/array/dtypes' );
var ctors = require( '@stdlib/array/ctors' );
var dtype = require( '@stdlib/array/dtype' );

var DTYPES;
var ctor;
var arr;
var len;
var dt;
var i;

// Get a list of supported array data types:
DTYPES = dtypes();

// Array length:
len = 10;

// For each supported data type, create an array and confirm its data type...
for ( i = 0; i < DTYPES.length; i++ ) {
    ctor = ctors( DTYPES[ i ] );
    arr = new ctor( len );
    dt = dtype( arr );
    console.log( '%s == %s => %s', DTYPES[ i ], dt, DTYPES[ i ] === dt );
}
```

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* * *

## 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>

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

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