>python Python 2.5.1 (r251:54863, Feb 4 2008, 21:48:13) [GCC 4.0.1 (Apple Inc. build 5465)] on darwin Type "help", "copyright", "credits" or "license" for more information. >>> 200/400 0 >>> 200.0/400 0.5 >>> from __future__ import division >>> 200/400 0.5 >>> 200//400 0 >>> print "In Python 3.0 200/400 will yield 0.5" In Python 3.0 200/400 will yield 0.5 >>>