Answer to Question #185135 in Python for FORTUNE AIDOO

Question

1. Copy the countdown function from below.

def countdown(n):

   if n <= 0:

     print('Blastoff!')

   else:

     print(n)

     countdown(n-1)

Write a new recursive function countup that expects a negative argument and counts “up” from that number. Output from running the function should look something like this:

>>> countup(-3)

-3

-2

-1

Blastoff!

Write a Python program that gets a number using keyboard input. (Remember to use input for Python 3 but raw_input for Python 2.)

If the number is positive, the program should call countdown. If the number is negative, the program should call countup. Choose for yourself which function to call (countdown or countup) for input of zero.

Provide the following.

• The code of your program.

Answer 1

def countdown(n):
    if n <= 0:
        print('Blastoff!')
    else:
        print(n)
        countdown(n-1)
        

def countup(n):
    if n >= 0:
        print('Blastoff!')
    else:
        print(n)
        countup(n+1)
        

n = int(input('Enter your number: '))
if n > 0 :
    countdown(n)
else:
    countup(n)