problems with a for loop (noobie)

[Jeremy S Lowery]

"Charles Mantha" <charles_mantha at hotmail.com> wrote in message
news:1IsV8.42194$Fc1.850199 at wagner.videotron.net...
> Reading the Python Tutorial by Guido van Russom and there's an example
that
> I don't get, and seems to not be explained (at least not enought for me).

> The line < ...         if n % x == 0: >, what does the % do?

% is the mod operator. It retrieves the remainder of the operands, from
dividing them.

>>> 4 % 2
0

4 / 2 = 2 r 0

>>> 20 % 8
4

20 / 8 =  2 r 4

Just remember 3rd grade, when you did remainders and not decimals :)

> Also I just seem to not get the logic of this program. Would be nice if
> someone would explain it to me.

if n % m == 0 then n is equally divisible by m (i.e. no remainder). like 4 %
2,  27 % 3,  121 % 11, 32 % 8

If you're into prime numbers:
http://www.utm.edu/research/primes/prove/index.html

Jeremy S Lowery