automate the boring stuff with python chapter 3 practice project

Question

please help me.

for the practice project in chapter 3 of 'automate the boring stuff with python', I made my own code. but it has errors I could not fix.

def collatz(number):

    if number == 1:
        print('the sequence is done')

    elif number % 2 == 0:
        print(number / 2)
        collatz(number / 2)

    else:
        print(number * 3 + 1)
        collatz(number * 3 + 1)

def begin():

    try:
        num = int(input("enter an integer: "))

    except ValueError:
        print("Please enter an integer greater than 1.")
        begin()

    if not num > 1:
        print("Please enter an integer greater than 1.")
        begin()

    collatz(num)

begin()

running it makes a loop error. I have tried to fix it but I just got stuck on it.

Answer 1

def collatz(number):
    if number % 2 == 0:
        print(number // 2)
        return number // 2
    elif number % 2 == 1:
        print(3 * number + 1)
        return 3 * number + 1

try:
    user_input = int(input('Enter a number:\n'))
    new_num = collatz(user_input)
    while new_num != 1:
        new_num = collatz(new_num)
except ValueError:
    print('Please enter an integer')

It says to print and return, so you don't need to use recursion. Here's how I did the program. I also used a while loop to repeat the process until a certain condition was met (until the value was 1).