[Edit] Python Strings: .isdigit() (#6610)

Author: Sriparno08

content/python/concepts/strings/terms/isdigit/isdigit.md

@@ -1,29 +1,38 @@
 ---
 Title: '.isdigit()'
-Description: 'Checks if all the elements in the string are digits and returns a boolean flag.'
+Description: 'Checks if all the elements in the string are digits and returns a boolean flag based on the result.'
 Subjects:
-  - 'Data Science'
   - 'Computer Science'
+  - 'Data Science'
 Tags:
-  - 'Strings'
-  - 'Methods'
+  - 'Characters'
   - 'Functions'
+  - 'Methods'
+  - 'Strings'
 CatalogContent:
   - 'learn-python-3'
   - 'paths/analyze-data-with-python'
 ---
 
-The **`.isdigit()`** method under the string class checks if all the elements in the string are digits; applicable elements also include special cases like compatibility superscript digits (¹, ², ³, etc.). The method returns `True` in the mentioned cases and must not be an empty string, otherwise, it returns `False`.
+The **`.isdigit()`** method under the `string` [class](https://www.codecademy.com/resources/docs/python/classes) checks if all the elements in the string are digits; applicable elements also include special cases like superscript digits (¹, ², ³, etc.). The method returns `True` in the mentioned cases and `False` otherwise.
+
+This method is commonly used in input validation, data cleaning, and parsing operations where it is necessary to ensure that certain fields - like IDs, phone numbers (without formatting), or user-entered data - consist solely of digits. This method helps avoid errors that might occur from converting non-numeric strings to integers.
 
 ## Syntax
 
 ```pseudo
 string.isdigit()
 ```
 
-## Example
+In the syntax, `string` needs to be replaced with the name of the string on which the `.isdigit()` method is to be called.
+
+**Return value:**
 
-The code below uses `.isdigit()` to check if a string contains only digits:
+The method returns `True` if all the characters in a string are digits and `False` otherwise.
+
+## Example 1: Basic Usage of `.isdigit()`
+
+This example uses the `.isdigit()` method to check if the given strings only contains digits:
 
 ```py
 my_string1 = "123"
@@ -33,18 +42,51 @@ print(my_string1.isdigit())
 print(my_string2.isdigit())
 ```
 
-This results in the following output:
+The output for the example will be:
 
 ```shell
 True
 False
 ```
 
-## Codebyte Example
+## Example 2: Using `.isdigit()` on a String with Letters
+
+This example uses the `.isdigit()` method on a string containing alphabetical characters:
+
+```py
+text = "123abc"
+
+print(text.isdigit())
+```
+
+The output for the example will be:
+
+```shell
+False
+```
+
+## Codebyte Example: Using `.isdigit()` on a String with Special Characters
 
-The code below is runnable and uses `.isdigit()` to check `my_string`:
+This codebyte example uses the `.isdigit()` method on a string containing special characters like `!`, `-`, `\`, and `n`:
 
 ```codebyte/python
 my_string = "!--1234--\n"
+
 print(my_string.isdigit())
 ```
+
+Since these special characters are not considered digits, the output for the example will be `False`.
+
+### Frequently Asked Questions
+
+### 1. What is the difference between `.isdigit()` and `.isnumeric()` in Python?
+
+Both `.isdigit()` and [`.isnumeric()`](https://www.codecademy.com/resources/docs/python/strings/isnumeric) return `True` for digit characters. However, `.isnumeric()` recognizes a broader set of numeric characters, including fractions, subscripts, superscripts, and other Unicode characters representing numbers. For example, the Unicode character `\u00B2` (superscript 2) is considered numeric but not a digit.
+
+### 2. What is the difference between `.isdigit()` and `.isdecimal()` in Python?
+
+[`.isdecimal()`](https://www.codecademy.com/resources/docs/python/strings/isdecimal) is more restrictive than `.isdigit()`. It only returns `True` for characters that are strictly decimal numbers (0–9). In contrast, `.isdigit()` includes characters like superscripts.
+
+### 3. Does `.isdigit()` work for floats?
+
+No, `.isdigit()` returns `False` for strings representing float numbers because of the presence of a decimal point, which is not considered a digit.