Python String - isdigit() method (With Examples)

isdigit() is an in-built method in python which is used for string manipulations. isdigit() returns True if all characters in the string are digits, else it returns False. This Python String Method does not take any parameters.

Syntax

string.isdigit()

Returns

True - If all the characters in the string are digits.
False - If 1 or more non-digit characters are present in string.

Example 1

# checking for digit using isdigit
str = '987654321'
print(str.isdigit())

str = 'Houseno22'
print(str.isdigit())

Output 

True
False

Example 2

# Checking for superscripts or subscripts with isdigit
str = '550\u2076'
print(str.isdigit())

Output 

True

Note: fractions, roman numerals are not considered digits, hence isdigit() returns False. This method will work with unsigned integers, superscripts or subscripts.

Further Read:

• Python String Methods
• Python String - isalpha() method
• Convert integer to string in Python
• Convert string to integer in Python