a="12345"print(a.isdigit())b="1234a5"print(b.isdigit())

TrueFalse

Explanation:In this example,a.isdigit()returnsTrue because "12345" consists entirely of numeric characters, whileb.isdigit() returnsFalse due to the non-numeric character "a" in the string.

Syntax of isdigit()

s.isdigit()

Parameters:This method does not take any parameters

Returns:

• It returns True if every character in the string is a numeric digit (0-9).
• It returns False if there is any non-numeric character in the string.

Examples of isdigit()

Let's explore some examples of isdigit()method for better understanding.

Example 1: Here are example with a string containing only digits, a mixed-character string and an empty string.

# Only digitsprint("987654".isdigit())# Digits and alphabetprint("987b54".isdigit())# Empty stringprint("".isdigit())

TrueFalseFalse

Explanation:

• "987654".isdigit()returns True as it contains only numeric digits.
• "987b54".isdigit() returns False due to the non-digit character 'b'.
• "".isdigit()returns False because the string is empty.

Example 2: Theisdigit() method can also be used to check numeric characters encoded in Unicode, such as the standard digit '1' and other Unicode representations of numbers.

# Unicode for '1'a="\u0031"print(a.isdigit())# Devanagari digit for '1'b="\u0967"print(b.isdigit())

TrueTrue

Explanation:

• "\u0031".isdigit()returns True as it represents the standard digit '1'.
• "\u0967".isdigit() returns True as it represents the Devanagari digit '1'.

Example 3: Here are example with Roman numerals, which are not recognized as digits.

print("I".isdigit())print("X".isdigit())print("VII".isdigit())

FalseFalseFalse

Explanation:"I".isdigit(), "X".isdigit() and "VII".isdigit() all return False as Roman numerals are not recognized as digits by isdigit().

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