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# Node-API ndarray dtype
> C API for returning the ndarray [data type][@stdlib/ndarray/dtypes] corresponding to a Node-API typed array type.
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</section>
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<!-- Package usage documentation. -->
<section class="usage">
## Usage
```c
#include "stdlib/ndarray/base/napi/typedarray_type_to_dtype.h"
```
#### stdlib_ndarray_napi_typedarray_type_to_dtype( napi_typedarray_type vtype )
Returns the ndarray [data type][@stdlib/ndarray/dtypes] corresponding to a Node-API typed array type.
```c
#include "stdlib/ndarray/base/napi/typedarray_type_to_dtype.h"
#include "stdlib/ndarray/dtypes.h"
#include <node_api.h>
#include <assert.h>
// Add-on function export...
napi_value addon( napi_env env, napi_callback_info info ) {
// ...
// Get function arguments...
size_t argc = 1;
napi_value argv[ 1 ];
napi_status status = napi_get_cb_info( env, info, &argc, argv, NULL, NULL );
assert( status == napi_ok );
// ...
// Get a typed array argument...
napi_typedarray_type vtype;
size_t xlen;
void *X;
status = napi_get_typedarray_info( env, argv[ 0 ], &vtype, &xlen, &X, NULL, NULL );
assert( status == napi_ok );
// ...
// Return the corresponding ndarray data type for the input typed array:
enum STDLIB_NDARRAY_DTYPE dtype = stdlib_ndarray_napi_typedarray_type_to_dtype( vtype );
// ...
}
```
</section>
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<!-- Package usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
<section class="notes">
</section>
<!-- /.notes -->
<!-- Package usage examples. -->
<section class="examples">
</section>
<!-- /.examples -->
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</section>
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<section class="links">
[@stdlib/ndarray/dtypes]: https://github.com/stdlib-js/ndarray/tree/main/dtypes
</section>
<!-- /.links -->
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