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# NumPy char | isupper method

schedule Aug 12, 2023
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Numpy's `np.char.isupper(~)` method takes as input an array of strings, and returns a Numpy array of booleans where `True` means that all characters of the string are uppercased.

# Parameters

1. `a` | `array-like`

The input array of strings.

# Return value

A Numpy array of booleans where `True` is returned if all characters of the string are uppercased.

# Examples

``` x = np.array(["Ab", "AB", "ab"]) np.char.isupper(x) array([False, False, True]) ```

Here, `True` is returned only for `"AB"` since it is the only string with all its characters uppercased.

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