Python String isnumeric()

pin = "523"

# checks if every character of pin is numeric 
print(pin.isnumeric())

# Output: True

isnumeric() Syntax

The syntax of the isnumeric() method is:

string.isnumeric()

Here, isnumeric() checks if all characters in string are numeric or not.

isnumeric() Parameters

The isnumeric() method doesn't take any parameters.

isnumeric() Return Value

The isnumeric() method returns:

• True -if all characters in the string are numeric
• False -if at least one character is not a numeric

Example 1: Python isnumeric()

symbol_number = "012345"

# returns True as symbol_number has all numeric characters  
print(symbol_number.isnumeric()) 

text = "Python3"

# returns False as every character of text is not numeric 
print(text.isnumeric())

Output

True 
False

In the above example, we have used the isnumeric() method to check whether every character in symbol_number and text is numeric or not.

The method returns:

• True - for symbol_number since every character in "012345" are numeric
• False - for text since every character in "Python3" are not numeric

Example 2: isnumeric() with Other Numeric Types

Python treats mathematical characters like numbers, subscripts, superscripts, and characters having Unicode numeric value properties (like a fraction, roman numerals, currency numerators) as numeric characters.

The isnumeric() method returns True with these characters. For example:

# string with superscript 
superscript_string = '²3455'
print(superscript_string.isnumeric())

# string with fraction value 
fraction_string = '½123'
print(fraction_string.isnumeric())

Output

True
True

Here, we have used the isnumeric() method with strings that contain superscript and fraction.

• superscript_string.isnumeric() -returns True because '²3455' contains all numeric characters.
• fraction_string.isnumeric() - returns True because '½123' contains all numeric characters.

Also Read:

• Python String isdigit()
• Python String isalnum()
• Python String isdecimal()