# xarray.core.accessor_str.StringAccessor.isdigit

#### StringAccessor.isdigit()[[source]](https://github.com/pydata/xarray/blob/main/xarray/core/accessor_str.py#L937-L959)

Check whether all characters in each string are digits.

* **Returns:**
  **isdigit** ([array](https://numpy.org/doc/stable/glossary.html#term-array) of [`bool`](https://docs.python.org/3/builtins/functions.html#bool)) – Array of boolean values with the same shape as the original array.

### Examples

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```pycon
>>> da = xr.DataArray(["123", "1.2", "0", "CO2", "NaCl"], dims="x")
>>> da
<xarray.DataArray (x: 5)> Size: 80B
array(['123', '1.2', '0', 'CO2', 'NaCl'], dtype='<U4')
Dimensions without coordinates: x
>>> isdigit = da.str.isdigit()
>>> isdigit
<xarray.DataArray (x: 5)> Size: 5B
array([ True, False,  True, False, False])
Dimensions without coordinates: x
```

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