Refactor/regex10digit (ServiceNowDevProgram#2062)

* Update script.js

- Renamed variable reg to digitLengthRegex to better reflect its purpose.
- Replaced string-based regex ('/^\d{10}$/') with a proper RegExp object.
- Added test cases for strings with 9, 10, and 11 digits to demonstrate expected behavior.
- Improved inline comments.

* Update README.md

Updated the readme to be more descriptive.

Author: WillemZeiler

Specialized Areas/Regular Expressions/Check if number has 10 digits/README.md

@@ -1 +1,11 @@
-Script is used to check if the number has 10 digts( you can update the digit count in the code based on the need.
+# Digit Length Validator
+
+## Description
+
+This script checks if a string contains exactly a specified number of digits. Useful for validating numeric input. The digit count can be adjusted in the code.
+
+## Usage
+To change the required digit count, update the number in the regular expression
+```
+var digitLengthRegex = /^\d{N}$/;  // Replace N with desired digit count
+```

Specialized Areas/Regular Expressions/Check if number has 10 digits/script.js

@@ -1,7 +1,9 @@
-var reg = '/^\d{10}$/';  // Update the number based on the need
+var digitLengthRegex = /^\d{10}$/;  // Matches exactly 10 digits
 
-var k = '123456789144'; // example
+var elevenString = '01234567899'; // 11 digits
+var tenString = '0123456789';     // 10 digits
+var nineString = '012345678';     // 9 digits
 
- if (/^\d{10}$/.test(k)){ // This will check if it has 10 digits
-  
-}
+gs.info(digitLengthRegex.test(elevenString)); // false
+gs.info(digitLengthRegex.test(tenString));    // true
+gs.info(digitLengthRegex.test(nineString));   // false