syntax error in python

[Lalit]

Hi
I am executing following commands.
>>> test = os.path.isfile('c:\\src\\kasjdfl.txt')
>>> print test
True
------------working fine but for below statement it is giving syntax
error.

>>> if (os.path.isfile('c:\\src\\kasjdfl.txt'))
SyntaxError: invalid syntax

any idea what is incorrect in my syntax