SyntaxError when i used interpreter

[hydor]

Hi.
I'm just a beginner, and I have a problem that I couldn't understand the reason.

f = open ("C:/doit/newfile.txt", 'w')
for i in range(1,11):
    data = "%d line. \n" % i
    f.write(data)
f.close()

I was practising file input and output.
when I tried to run on windows command prompt, it was successful.
On the other hand, on python interpreter (Python3.7.2), it had a syntax error like below.

>>> f = open ("C:/doit/newfile.txt", 'w')
>>> for i in range(1,11):
...     data = "%d line. \n" % i
...     f.write(data)
... f.close()
  File "<stdin>", line 4
    f.close()
    ^
SyntaxError: invalid syntax

Please let me know the reason.