# Collatz Operation
def collatz(number):
    if number % 2 == 0: # Check for Even
        operation = number // 2
        print(operation)
        return operation
    else:
        operation = 3 * number + 1
        print(operation)
        return operation


# Recurse Collatz
def callCollatz():
    try:
        num = int(input("Enter an integer: \n")) # Accept User Input and Parse it to Integer Type
        while True: # Infinite Loop
            num = collatz(num) # Set the Number To the Current Return Value of Collatz Operation in Local Iteration
            if num == 1: # Break If The Collatz Sequence Ends
                break
    except ValueError:
        print("Please input an integer!")


# Invoke Collatz
callCollatz()