How to Check if String contains only Numeric Digits in Python

How to Check if String contains only Numeric Digits in Python ?

Answer

To check if a string contains only numeric digits in Python, you can use regular expressions or iterate through each character in the string and check if it is a digit using 'isdigit' method.

✐ Examples

1 Check if String contains only Numeric Digits using regular expressions

In this example,

We create a function 'containsOnlyNumericDigits' that takes a string as input.
We use a regular expression pattern '\d+' to match only numeric digits in the string.
If the entire string matches the pattern, 'True' is returned; otherwise, 'False'.
Finally, we print the result.

Python Program

import re

def containsOnlyNumericDigits(s):
    return bool(re.match(r'^\d+$', s))

str = '12345'
allDigits = containsOnlyNumericDigits(str)
print('String contains only numeric digits:', allDigits)

Output

String contains only numeric digits: True

2 Check if String contains only Numeric Digits using character iteration

In this example,

We create a function 'containsOnlyNumericDigits' that takes a string as input.
We iterate through each character in the string and check if it is a digit using 'isdigit' method.
If all characters are numeric digits, 'True' is returned; otherwise, 'False'.
Finally, we print the result.

Python Program

def containsOnlyNumericDigits(s):
    return all(char.isdigit() for char in s)

str = '12345'
allDigits = containsOnlyNumericDigits(str)
print('String contains only numeric digits:', allDigits)

Output

String contains only numeric digits: True

Summary

In this tutorial, we learned How to Check if String contains only Numeric Digits in Python language with well detailed examples.

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How to Check if String contains only Numeric Digits in Python

How to Check if String contains only Numeric Digits in Python ?

Answer

✐ Examples

1 Check if String contains only Numeric Digits using regular expressions

Python Program

Output

2 Check if String contains only Numeric Digits using character iteration

Python Program

Output

Summary

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