learn how to use python string isnumeric() with example

Python string isnumeric() method with example

The isnumeric() method in Python is a built-in string method that checks whether a string consists only of numeric characters. It returns True if all the characters in the string are numeric, and False otherwise.

Syntax:

string.isnumeric()

How to use the isnumeric() method:

string1 = "12345"
print(string1.isnumeric()) # Output: True

string2 = "Hello123"
print(string2.isnumeric()) # Output: False

string3 = "12.5"
print(string3.isnumeric()) # Output: False

string4 = "①②③"
print(string4.isnumeric()) # Output: True

Example 1

Filter Numeric Strings from a List.

strings = ["123", "Hello", "456", "World", "789"]

numeric_strings = list(filter(lambda x: x.isnumeric(), strings))

print(numeric_strings) # Output: ['123', '456', '789']

Example 2

Extract Digits from a String using List Comprehension.

string = "Hello123World456"

digits = [int(char) for char in string if char.isnumeric()]

print(digits) # Output: [1, 2, 3, 4, 5, 6]

Example 3

Counting Digits in a String.

def count_digits(string):
  count = 0
  for char in string:
    if char.isnumeric():
      count += 1
  return count

# Usage
string = "Hello123World456"
digit_count = count_digits(string)
print("Number of digits in the string:", digit_count)
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