basic python question about for loop

[Steve Holden]

jmDesktop wrote:
[...]
> So what is n and x in the first iteration?  Sorry.  I'm trying.

Somewhat feebly, if you don't mind my saying so, but don't worry.

The usual way to proceed in the face of such ignorance is to insert some 
form of output that will tell you the answer to your question.

So:

 >>> for n in range(2, 20):
...     print range(2, n)
...     for x in range(2, n):
...         if n % x == 0:
...            print n, 'equals', x, '*', n/x
...            break
...     else:
...         print n, "is prime"
...
[]
2 is prime
[2]
3 is prime
[2, 3]
4 equals 2 * 2
[2, 3, 4]
5 is prime
[2, 3, 4, 5]
6 equals 2 * 3
[2, 3, 4, 5, 6]
7 is prime
[2, 3, 4, 5, 6, 7]
8 equals 2 * 4
[2, 3, 4, 5, 6, 7, 8]
9 equals 3 * 3

and so on! This is the value of the interactive interpreter.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
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