def collatz(number):
if number % 2 == 0:
print(number // 2)
return number // 2
elif number % 2 == 1:
result = 3 * number + 1
print(result)
return result
n = input("Give me a number: ")
while n != 1:
n = collatz(int(n))
输出：
Give me a number: 3
10
5
16
8
4
2
1
Give me a number: 11
34
17
52
26
13
40
20
10
5
16
8
4
2
1
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