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# nextDataType

> Return the next larger array [data type][@stdlib/array/dtypes] of the same kind.

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## Usage

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

#### nextDataType( \[dtype] )

If provided a `dtype` argument, returns the next larger array [data type][@stdlib/array/dtypes] of the same kind.

```javascript
var out = nextDataType( 'float32' );
// returns 'float64'
```

If a [data type][@stdlib/array/dtypes] does not have a next larger [data type][@stdlib/array/dtypes] or the next larger data type is not supported, the function returns `-1`.

```javascript
var out = nextDataType( 'complex128' );
// returns -1
```

If not provided a `dtype` argument, the function returns a table.

```javascript
var out = nextDataType();
// returns {...}
```

If provided an unrecognized or unsupported `dtype`, the function returns `null`.

```javascript
var out = nextDataType( 'foo' );
// returns null
```

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</section>

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## Examples

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

```javascript
var dtypes = require( '@stdlib/array/dtypes' );
var nextDataType = require( '@stdlib/array/next-dtype' );

var DTYPES;
var dt;
var i;

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

// Print the next larger data type for each supported data type...
for ( i = 0; i < DTYPES.length; i++ ) {
    dt = nextDataType( DTYPES[ i ] );
    console.log( '%s => %s', DTYPES[ i ], dt );
}
```

</section>

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* * *

## See Also

-   <span class="package-name">[`@stdlib/array/dtype`][@stdlib/array/dtype]</span><span class="delimiter">: </span><span class="description">return the data type of an array.</span>
-   <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/dtype]: https://github.com/stdlib-js/array/tree/main/dtype

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

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