Python string Method - isdigit()-IGI

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The isdigit() method is a built-in Python string method that returns a boolean value indicating whether all the characters in the string are digits.

Here's an example that demonstrates the usage of the isdigit() method:

string1 = "123"
string2 = "123.45"

print(string1.isdigit())  # Output: True
print(string2.isdigit())  # Output: False

In this example, we create two strings: string1 which contains only digits, and string2 which contains a non-digit character (a decimal point). We then call the isdigit() method on each string. The method returns True for string1 since all its characters are digits, and False for string2 since it contains a non-digit character.

The isdigit() method returns True if the string is not empty and all its characters are digits, and False otherwise. Here are some additional examples:

print("".isdigit())  # Output: False
print("123ABC".isdigit())  # Output: False
print("１２３".isdigit())  # Output: True

In the first example, we call the isdigit() method on an empty string, which returns False since the string does not contain any digits. In the second example, we call the method on a string containing non-digit characters, which returns False. In the third example, we call the method on a string containing Unicode digits (i.e., full-width digits), which returns True. Note that the isdigit() method only recognizes characters in the ASCII range as digits; full-width digits are recognized as digits by isdigit() but not by isdecimal().

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Python string Method - isdigit()