Python String isnumeric() Method

The method isnumeric() checks whether the string consists of only numeric characters. This method is present only on unicode objects.

The syntax of the method is: str.isnumeric()

Key Points :

• There are no isdecimal() function parameters.
• The function isumeric() returns true if all string characters are numerical; otherwise, false is returned.
• There is something unique about numerics, which is that in Unicode, they can all be represented.
• Another benefit of the isumeric() approach is that it helps count numbers in a string.
• Decimal characters (such as 0,1,2), numbers (such as a subscript, superscript), and characters with
a numeric meaning attribute in Unicode (such as percentages, roman numerals, currency numerators) is always numerical.

Return Value from isnumeric()

The isnumeric() method returns:

• This approach returns true if the string includes all the numerical characters.
• If the string has more than one non-numeric character (alphabet or a single character), it returns false.

Below is the python program to demonstrate the isnumeric() function:

str = u"Since2012";
print (str.isnumeric())
str = u"9815618378";
print (str.isnumeric())

When we run above the program, the outcome is as follows:

False
True

How to use isnumeric()?

str = '\u00B98156'
if str.isnumeric() == True:
print('All the Characters are Numeric.')
else:
print('All Characters are not Numeric.')

When we run above the program, the outcome is as follows:

All the Characters are Numeric.

Below are several other functions that we can use to work with string in Python 3