1 def collatz(number):
 2     if number % 2 == 0:
 3         print(number // 2)
 4         return number // 2
 5     elif number % 2 == 1:
 6         print(3 * number + 1)
 7         return 3 * number + 1
 8 
 9 try:
10     yourNumber = int(input(‘Enter number:‘))
11 except ValueError:
12     print(‘you must enter a int number‘)
13 while yourNumber != 1:
14     yourNumber = collatz(yourNumber)