Collatz try and except clause

# This is a program to show the Collatz Sequence
def collatz(number):
    if number % 2 == 0:
        return number // 2
    elif number % 2 == 1:
        return 3 * number + 1

# Ask for the player to enter a number.
print('Enter number greater than 1:')

try:
    userint = int(input())
    result = collatz(userint)
except ValueError:
    print('Error: You must enter an integer.')

while result > 1:
    result = collatz(result)
    print(result)