Determines whether the string contains numeric characters

## Usage

The `isnumeric()` method returns TRUE if the string is nonempty and all characters in it are numeric characters. Otherwise, it returns FALSE.

Numeric characters include digit characters, and all characters that have the Unicode numeric value property.

e.g. ² (U+00b2, Superscript Two), ⅕ (U+2155, Vulgar Fraction One Fifth)

## Syntax

string.isnumeric()

## Basic Examples

Example: Check if all characters in the string are numeric characters

``````S = '123'
x = S.isnumeric()
print(x)    # True``````

Below are a few examples where `isnumeric()` method returns false.

Example:

``````# floating point number
S = '123.456'
x = S.isnumeric()
print(x)    # False``````
``````# number with thousands separator
S = '1,234,567'
x = S.isnumeric()
print(x)    # False``````
``````# empty string
S = ''
x = S.isnumeric()
print(x)    # False``````

## isnumeric() on Unicode Numeric Characters

Unicode character such as superscript digit `²` is considered as a numeric character.

Example:

``````S = '\u00b2'
x = S.isnumeric()
print(x)    # True``````

Unicode character like Vulgar Fraction One Third `⅓` is also considered as a numeric.

Example:

``````S = '\u2153'
x = S.isnumeric()
print(x)    # True``````

## isdecimal() vs isdigit() vs isnumeric()

Following examples explain the difference between the three methods.

Example: Is 42 a decimal or digit or numeric number?

``print('42'.isdecimal())		# True``
``print('42'.isdigit())		# True``
``print('42'.isnumeric())		# True``

Example: Is ² (Superscript Two) a decimal or digit or numeric number?

``print('\u00b2'.isdecimal())		# False``
``print('\u00b2'.isdigit())		# True``
``print('\u00b2'.isnumeric())		# True``

Example: Is ⅓ (Vulgar Fraction One Third) a decimal or digit or numeric number?

``print('\u2153'.isdecimal())		# False``
``print('\u2153'.isdigit())		# False``
``print('\u2153'.isnumeric())		# True``

As you can see, the main difference between the three functions is:

• isdecimal() method supports only Decimal Numbers.
• isdigit() method supports Decimals, Subscripts, Superscripts.
• isnumeric() method supports Digits, Vulgar Fractions, Subscripts, Superscripts, Roman Numerals, Currency Numerators.