Fix NumberFormatException

✅ Solution

The NumberFormatException arises when code attempts to convert a string to a numerical type (e.g., integer, float), but the string doesn't represent a valid number. To fix this, ensure that the string being converted contains only numerical digits and allowed characters (e.g., decimal point) and implement input validation or error handling (try-catch block) to gracefully manage scenarios where the string is not a valid number. If applicable sanitize the inputs expected as numerals to remove illegal leading/trailing characters.