isdecimal(): Check for Decimal Characters

isdecimal()

my_str='12345'
print(my_str.isdecimal())      # Output is True

my_str='234ab'
print(my_str.isdecimal())      # Output is False

my_str='234.45'
print(my_str.isdecimal())      # Output is False

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

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

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

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

Example 1: Basic Usage of isdecimal()

text = "12345"
print(text.isdecimal())  # Output: True

Example 2: Using isdecimal() with Non-decimal Characters

text = "123.45"
print(text.isdecimal())  # Output: False

Example 3: Difference Between isdecimal() and isnumeric()

text = "123\u00B2"  # ² is superscript 2
print(text.isdecimal())  # Output: False
print(text.isnumeric())  # Output: True

Applications of isdecimal()

• Input Validation: Confirm that input consists only of basic decimal numbers.
• Data Filtering: Separate purely numeric strings from mixed content.