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Python String | isdigit method

Operations
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String Operations
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Documentation
schedule Jul 1, 2022
Last updated
local_offer 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.

Parameters

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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Published by Isshin Inada
Edited by 0 others
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