PythonLearning/blastoff/main.py

from time import (
    sleep,  # the sleep function adds a delay, allowing time to tick down by a second rather than instantly
)


def countdown(n: int) -> None:
    if n <= 0:                      #If a number is less than or equal to 0,
        print('Blastoff!')          #Blastoff! is printed, else
    else:
        print(n)                    #we print the current number inputted,
        sleep(1)                    #The code is delayed by a second to replicate an actual countdown
        countdown(n-1)              #The code deducts 1 from our inputted number, until it reaches 0.

def countup(n: int) -> None:
    if n >= 0:                  #we're definining the countup function, if a number is 0 or greater
        print('Blastoff!')      #if the above condition is met, Blastoff! is printed, else
    else:
        print(n)                #we print the number
        sleep(1)                #delay the code by a second to match an actual countdown(countup in this instance)
        countup(n+1)            #We add 1 to our number, since with a countup, we'll be dealing with negatives going towards 0

def count(n: int) -> None:        #this part of the code checks to see if a number is positive or negative
    if int(n) >= 0:               #We're checking for if a positive number is inputted, or negative
        countdown(n)              #If positive, we'll utilize the Countdown function
    else:
        countup(n)                #If negative, we'll utilize the countup function

if __name__ == "__main__":
    num: str = input("Enter a number: ")
    count(int(num))