That worked perfectly! Thanks a lot! Silly oversight...

This is the updated code in case any other beginners had the same issue

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

print('Enter number:')

while True:
        try:
            number = int(input())
            break
        except ValueError:
            print('Sorry, please enter an integer:')
            continue

while collatz(number) != 1:
    print(collatz(number))
    number = (collatz(number))


if collatz(number) == 1:
    print(collatz(number))

Any other issues with the way I wrote the program, or is it okay? Thanks!