python 3 print function

Question

So I want to print this:

*
**
***
****
*****

And my code is:

for row in range(1,6):
    for col in range(row): 
        print('*', end="")
    print('')

My question is about print function, since it includes new line. Knowing some C before, I just can't figure it out what the last print('') does, and why my code doesn't work without it.

Answer 1

The end='' parameter to the first call to print suppresses printing a newine after the *, and the second call to print prints only a newline.