On 01/12/2013 17:40, eryksun wrote:
On Sun, Dec 1, 2013 at 6:14 AM, Steven D'Aprano <st...@pearwood.info> wrote:
On Sun, Dec 01, 2013 at 02:57:33PM +0530, Reuben wrote:
I mean occurrence of 2 from numbers 1 to 100. The number could be the
first digit or second digit in a two digit number..for e.g. In number 21 it
appears as first digit. For number 92 it appears as second digit
The most efficient way is to use a bit of reasoning:
2, 12, 20 through 29, then 32, 42, 52 etc.
>>> [n for n in range(100) if n % 10 == 2 or n // 10 == 2]
[2, 12, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29,
32, 42, 52, 62, 72, 82, 92]
Floor division (//) and modulo (%) are explained here:
http://docs.python.org/2/reference/expressions.html#binary-arithmetic-operations
I wish people would use Python 3 references. I believe it would lead to
a greater take up of, IMHO, a superior product than Python 2.
--
Python is the second best programming language in the world.
But the best has yet to be invented. Christian Tismer
Mark Lawrence
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