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# Python String | isdigit method

schedule Aug 11, 2023
Last updated
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Python
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Python's `str.isdigit()` method returns a `boolean` indicating whether all characters in a string are digits.

NOTE

A digit character is defined as a character with property value `Numeric_Type = Digit` or `Numeric_Type = Decimal`. Superscript and subscripts are considered digit characters, while roman numerals, currency numerators and fractions are numeric hence are not considered digits.

No parameters.

# Return value

A single `boolean` indicating whether all the characters in a string are digits.

# Examples

## Digit characters

To check whether all the characters in `'123'` are digit characters:

``` a = '123'a.isdigit() True ```

To check whether all the characters in `'\u00B2123'` are digit characters:

``` b = '\u00B2123'b.isdigit() True ```

`'\u00B2123'` is Unicode for `'²123'` hence `True` is returned as superscripts are digit characters.

## Non-digit characters

To check whether all characters in `'123A'` are digit characters:

``` c = '123A'c.isdigit() False ```

As `'A'` is not a digit character `False` is returned.

To check whether all characters in `'\u00BD'` are digit characters:

``` d = '\u00BD'd.isdigit() False ```

`'\u00BD'` is Unicode for `'½'` hence `False` is returned as fractions are not digit characters.

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