Welcome to the Unit 3 Learning Journal!

Welcome to the Unit 3 Learning Journal!

1. Copy the countdown function from Section 5.8 of your textbook.

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

create 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!

create 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.
• Respective output for the following inputs: a positive number, a negative number, and zero.
• An explanation of your choice for what to call for input of zero.

2. create your own unique Python program that has a runtime error. Do not copy the program from your textbook or the Internet. Provide the following.

• The code for your program.
• Output demonstrating the runtime error, including the error message.
• An explanation of the error message.
• An explanation of how to fix the error.

The code and its output must be explained technically. The explanation can be provided before or after the code, or in the form of comments within the code. For code modification type of questions, always mention or clearly highlight the part which is modified, along with the reason stated, as a code comment. The descriptive part of your response must be at leastwords.
If you use an informational source, be sure to identify the source and share the link to the source you used.