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# Python String | isalnum method

schedule Aug 12, 2023
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Python's `str.isalnum()` method returns a `boolean` indicating whether all characters in a string are alphanumeric (i.e. alphabet letter (a - z) or number (0 - 9)).

No parameters.

# Return value

A single `boolean` indicating whether or not all the characters in a string are alphanumeric.

# Examples

## Alphanumeric

To check whether all characters in `'SkyTowner123'` are alphanumeric:

``` x = 'SkyTowner123'x.isalnum() True ```

## Not alphanumeric

To check whether all characters in `'Sky Towner 123'` are alphanumeric:

``` y = 'Sky Towner 123'y.isalnum()False False ```

The space character is not alphanumeric hence `False` is returned.

To check whether all characters in `'SkyTowner!123'` are alphanumeric:

``` z = 'SkyTowner!123'z.isalnum() False ```

The `!` character is not alphanumeric hence `False` is returned.

Published by Isshin Inada
Edited by 0 others
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