# example: write a program, using a while loop,
# that prints the numbers 1, 2, 3, ..., 10
index = 1
while index <= 10:
    print(index)
    index += 1


# Write a program, using a while loop, that prints
# the numbers 10, 8, 6, 4, 2

number = 10
while number > 0:
    print(number)
    number -= 2