On Apr 9, 4:59 pm, "Reedick, Andrew" <[EMAIL PROTECTED]> wrote: > > -----Original Message----- > > From: [EMAIL PROTECTED] [mailto:python- > > [EMAIL PROTECTED] On Behalf Of jmDesktop > > Sent: Wednesday, April 09, 2008 4:51 PM > > To: [EMAIL PROTECTED] > > Subject: basic python question about for loop > > > >From the Python.org tutorial: > > > >>> for n in range(2, 10): > > ... for x in range(2, n): > > ... if n % x == 0: > > ... print n, 'equals', x, '*', n/x > > ... break > > ... else: > > ... # loop fell through without finding a factor > > ... print n, 'is a prime number' > > ... > > 2 is a prime number > > 3 is a prime number > > 4 equals 2 * 2 > > 5 is a prime number > > 6 equals 2 * 3 > > 7 is a prime number > > 8 equals 2 * 4 > > 9 equals 3 * 3 > > > first time 2 mod 2, 2/2, no remainder == 0, what am I doing wrong? > > Why did it fall through? > > a) 2 is prime, so nothing is wrong. > > b) Range isn't doing what you think it's doing: > > >>> print range(2,2) > [] > >>> print range(2,3) > [2] > >>> print range(2,4) > [2, 3] > >>> print range(2,5) > > [2, 3, 4] > > > > >>> print range(1,1) > [] > >>> print range(1,2) > [1] > >>> print range(1,3) > [1, 2] > > ***** > > The information transmitted is intended only for the person or entity to > which it is addressed and may contain confidential, proprietary, and/or > privileged material. Any review, retransmission, dissemination or other use > of, or taking of any action in reliance upon this information by persons or > entities other than the intended recipient is prohibited. If you received > this in error, please contact the sender and delete the material from all > computers. GA622- Hide quoted text - > > - Show quoted text -
So what is n and x in the first iteration? Sorry. I'm trying. -- http://mail.python.org/mailman/listinfo/python-list
