A function to determine if all characters of a given string are unique, returning a boolean result.
The task is to create a function that checks if all the characters in a given string are unique. A string is said to be unique if there are no duplicate characters in it, disregarding case sensitivity. The function should return `True` if all characters are unique, and `False` otherwise. ### Parameters - `txt` (str): The input string to be tested for uniqueness of characters. ### Returns - `boolean`: The function returns `True` if all characters within `txt` are unique, case-insensitive, and `False` otherwise. ### Examples ```python # The string 'Algorism' doesn't contain any repeated characters regardless of case. check_unique_chars("Algorism") # True # The string 'PasSword' has repeated character 's/S'. check_unique_chars("PasSword") # False # The string 'Consecutive' has repeated characters 'c/C', 'o/O', 'e/E'. check_unique_chars("Consecutive") # False ```