Why purpose does the else statement serve in try/except if code runs fine?

Once the try/except combo is entered in this code to handle exceptions, what purpose does the else statement serve? The code runs fine without it. Tried looking this up myself in the official documentation (https://bit.ly/2ubE1Lw) which reads:

"The try ... except statement has an optional else clause, which, when present, must follow all except clauses. It is useful for code that must be executed if the try clause does not raise an exception.

The use of the else clause is better than adding additional code to the try clause because it avoids accidentally catching an exception that wasn’t raised by the code being protected by the try ... except statement."

If I understand this correctly, there could be other errors that could popup that are different from the error specified in the try-except portion. If by looking at the code below, an error other than an IndexError were to occur than the program would jump down to the else statement without the program breaking. Is this correct?

sodas = ["Pepsi", "Cherry Coke Zero", "Sprite"]
chips = ["Doritos", "Fritos"]
candy = ["Snickers", "M&Ms", "Twizzlers"]

while True:
    choice = input("Would you like a SODA, some CHIPS, or a CANDY? ").lower()
    try:
        if choice == 'soda':
            snack = sodas.pop()
        elif choice == 'chips':
            snack = chips.pop()
        elif choice == 'candy':
            snack = candy.pop()
        else:
            print("Sorry, I didn't understand that.")
            continue
    except IndexError:
        print("Sorry. We are all out of {}.".format(choice))
    else:
        print("Here's your {}: {}.".format(choice, snack))