Call to a print in a defined function

[leodavinci1990]

def fib(n):    # write Fibonacci series up to n
    """Print a Fibonacci series up to n."""
    a = 0
    b = 1
    while a < n:
        print(a, end=' ')
        a, b = b, a+b
    print()
# Now call the function we just defined:
fib(2000)

The output for this function is:
0 1 1 2 3 5 8 13 21 34 55 89 144 233 377 610 987 1597

My question is what is the function of the last print() function in the function since it has no arguments to print?