# Program for manipulating and checking ISBN-10 numbers.

# Calculate the check digit given inputNumber.
# Note that, despite the name, inputNumber is a string.
def calc10(inputNumber):
    return 0
    

def main():
    # Get an ISBN number (as a string) from the user.
    isbn = input("Please enter an ISBN-10 number:")

    # First determine and print out the check digit
    # actually contained in this string.


    # Then call calc10 to calculate the correct check digit
    # and print it out.


    # Then print out a statement about whether the two values
    # are equal.