def find_armstrong_numbers(start_range, end_range):
    armstrong_numbers = []
    for current_number in range(start_range, end_range + 1):

        number_string = str(current_number)
        number_of_digits = len(number_string)
        sum_of_powers = 0

        # Iterate through digits to calculate the sum of powers
        for digit_char in number_string:
            digit = int(digit_char)
            sum_of_powers += digit ** number_of_digits

        # Verify if the number is an Armstrong number
        if current_number == sum_of_powers:

            # Add the Armstrong number to the list
            armstrong_numbers.append(current_number)

    return armstrong_numbers

def is_armstrong_number(number_to_check):
    number_string = str(number_to_check)
    number_of_digits = len(number_string)
    sum_of_powers = 0

    # Iterate through digits to calculate the sum of powers
    for digit_char in number_string:
        digit = int(digit_char)
        sum_of_powers += digit ** number_of_digits

    #Return if Armstrong number
    return number_to_check == sum_of_powers

def get_armstrong_numbers_in_range(start_number, end_number):
    list_armstrong_numbers = []
    for number in range(start_number, end_number + 1):

        # Check each number in range
        if is_armstrong_number(number):
            list_armstrong_numbers.append(number)

    #Return the list of Armstrong numbers
    return list_armstrong_numbers

def is_armstrong_number(number):
    number_string = str(number)
    number_of_digits = len(number_string)

    # Need digit count for raising each digit to its power

    sum_of_powers = 0

    for digit_char in number_string:
        digit = int(digit_char)
        sum_of_powers += digit ** number_of_digits

    # Compare sum with original number

    if sum_of_powers == number:
        return True
    else:
        return False

def main():
    test_number_one = 153
    test_number_two = 120

    # Test case to confirm functionality

    is_armstrong_one = is_armstrong_number(test_number_one)
    is_armstrong_two = is_armstrong_number(test_number_two)
    print(f'{test_number_one} is Armstrong: {is_armstrong_one}')
    print(f'{test_number_two} is Armstrong: {is_armstrong_two}')

if __name__ == "__main__":
    main()