Question

For this interactive assignment, you will continue to utilize loops and functions and write a Python program that asks the user for an integer (number) greater than 1.

Once the user enters an integer, it should then allow the user to CHOOSE between the following two options:

If 1 is entered, a countdown from that number to zero is printed.

If 2 is entered, the factorial of the number is printed.

If the user inputs a number less than 1, your program should display a message informing the user that the program only accepts numbers greater than 1.

Answer 1

CODE:

#fucntion to print the countdown of the number n
def countdown(n):
print('Countdown: ')
#a loop is run for 'n' times
for i in range(n):
#the number is printed in reverse order
print(str(n-i))
#lastly the number 0 is printed
print('0')

#function to calculte factorial of the passed number n
def fact(n):
#variable that stores the factorial is intialised by 1
fact = 1
#a loop is run for 'number' times
for i in range(number):
#factorial is calculated
fact *= i+1
#then it is printed
print('The factorial of ',str(number),'is: ',str(fact))
  
#the variable which stores the entered number
number = 0
#while loop which gets terminated only if the user enters a number greater than 1
while(number<1):
#Asking the user for an input here
number = int(input('Enter a number greater than 1: '))
#giving the user two choices
print('Enter 1 to get a countdown from ',str(number),' to zero or press 2 to get the factorial of that number.')
choice = int(input())

#if the number entered was 1 by the user then the code will print a countdown
if choice == 1:
#calling the countdown function
countdown(number)
#if the user enters number 2 as choice
elif choice == 2:
#calling the function fact
fact(number)
#if the user enters something other than 1 or 2 then the following is printed
else :
print('Invalid Option selected!')

CODE IMAGES:

OUTPUT:

feel free to ask any questions in the comments section to get your doubts cleared
Thank You!