isdigit()

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my_str.isdigit())

Returns True if all chars are digits in a string, Otherwise False is returned.

my_str='012345'
print(my_str.isdigit())      # Output is True
my_str='12#34'print(my_str.isdigit())      # Output is False
my_str='abc1234'print(my_str.isdigit())      # Output is False
my_str='\u0035'              # Unicode of digit 5 print(my_str.isdigit())      # Output is True

Difference between isnumeric(), isdigit() and isdecimal()

Use google to search translate 1234 to chinese , then use the output like this.

my_str='一千二百三十四'print(my_str.isnumeric())  # Trueprint(my_str.isdigit())    # False print(my_str.isdecimal())  # False

One more example

my_str = '2²'print(my_str.isnumeric())  # Trueprint(my_str.isdigit())    # True print(my_str.isdecimal())  # False

my_str = '½'print(my_str.isnumeric())  # Trueprint(my_str.isdigit())    # False print(my_str.isdecimal())  # False

isdigit() will allow only digits 0-9

Example 1: Handling Unicode Characters

print("²".isdigit())  # Output: True (Superscript)print("٣".isdigit())   # Output: True (Arabic numeral)

Example 2: Validating User Input

user_input = input("Enter your age: ")if user_input.isdigit():    print("Valid age")else:    print("Invalid input")

Example 3: Mixed Strings with Digits and Letters

text = "123abc"print(text.isdigit())  # Output: False (contains letters)

Example 4: Strings with Spaces

text = "123 456"print(text.isdigit())  # Output: False (contains spaces)

Example 5: Strings with Decimal Points

text = "12.34"print(text.isdigit())  # Output: False (contains a decimal point)

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