# xarray.core.accessor_str.StringAccessor.isupper

#### StringAccessor.isupper()[[source]](https://github.com/pydata/xarray/blob/main/xarray/core/accessor_str.py#L1066-L1088)

Check whether all characters in each string are uppercase.

* **Returns:**
  **isupper** ([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(["TEMPERATURE", "humidity", "PreCIpiTAtioN"], dims="x")
>>> da
<xarray.DataArray (x: 3)> Size: 156B
array(['TEMPERATURE', 'humidity', 'PreCIpiTAtioN'], dtype='<U13')
Dimensions without coordinates: x
>>> isupper = da.str.isupper()
>>> isupper
<xarray.DataArray (x: 3)> Size: 3B
array([ True, False, False])
Dimensions without coordinates: x
```

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