How To Use Python String IsNumeric Method – Easy Python Code Examples

In this tutorial, we’ll learn what Python string isnumeric() method is and how to properly use it. We’ll go through multiple Python code examples to understand how isnumeric() method works in Python.

Outline

Introduction: Python String isnumeric() Method
Syntax of isnumeric() Method
Example 1: Apply isnumeric() Method on a Python String
Example 2: isnumeric() Method Return Value
Conclusion

Introduction: Python String isnumeric() Method

This method will return True if a string contains only numeric characters and will return False if atleast one character is non-numeric.

Syntax of isnumeric() Method

string.isnumeric()

Python string isnumeric() method does not take any arguments.
It returns True if a string has only numeric characters and will return False if atleast one character is non-numeric.

Example 1: Apply isnumeric() Method on a Python String

stringVal='2344693'
print(stringVal.isnumeric())

Output

True

Python string isnumeric() method return True as the specified string has only numeric characters.

See below examples in which isnumeric() method is applied to strings containing non-numeric characters as well.

print('P2344693'.isnumeric())
print('Python34'.isnumeric())
print('34_3'.isnumeric())
print('3 3'.isnumeric())
print('86&'.isnumeric())

Output

False 
False 
False 
False 
False

Python treats mathematical characters like superscripts, subscripts, numbers and characters having Unicode numeric value properties (like a roman numerals, fraction, currency numerators) as numeric characters. Python string isnumeric() method will return True if these characters are used in string(when no non-numeric characters are present). See below examples:

print('²479'.isnumeric())   // superscript value
print('2343½'.isnumeric())  // fraction value
print('²'.isnumeric())
print('½'.isnumeric())

Output

True 
True 
True 
True

Example 2: isnumeric() Method Return Value

stringVal='44693'
returnVal=stringVal.isnumeric()
print(returnVal)

Output

True

Python string isnumeric method return True as the specified string has only numeric characters present in it.

Conclusion

To conclude this tutorial, hope you now have a detailed practical knowledge of how to properly use Python string isnumeric method. I’ll be looking forward to have your valuable feedback. Thank you for reading this post.