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loop

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  loop pabloeruggeri@gmail.com - 2014-03-23 17:35 -0700
    Re: loop MRAB <python@mrabarnett.plus.com> - 2014-03-24 00:50 +0000
      Re: loop pabloeruggeri@gmail.com - 2014-03-23 17:57 -0700
    Re: loop Chris Angelico <rosuav@gmail.com> - 2014-03-24 11:52 +1100
      Re: loop Marko Rauhamaa <marko@pacujo.net> - 2014-03-24 09:47 +0200
        Re: loop Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-03-24 09:40 +0000
          Re: loop Marko Rauhamaa <marko@pacujo.net> - 2014-03-24 12:04 +0200
            Re: loop Chris Angelico <rosuav@gmail.com> - 2014-03-24 21:58 +1100
    Re: loop Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-03-24 00:56 +0000
    Re: loop anton <bupphairodazz@yandex.ru> - 2014-03-23 17:59 -0700
      Re: loop Mark H Harris <harrismh777@gmail.com> - 2014-03-23 22:30 -0500
    Re: loop Ben Finney <ben+python@benfinney.id.au> - 2014-03-24 13:31 +1100

#68827 — loop

Hello, 

I'm trying to create a for loop that starts at 100 and goes to 10Mllion. The increments are like this: 100, 1000, 10000, ..... Basicaly adding a zero each iteration. I'm having problems trying to do it. Can somebody help me

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#68828

On 2014-03-24 00:35, pabloeruggeri@gmail.com wrote:
> Hello,
>
> I'm trying to create a for loop that starts at 100 and goes to
> 10Mllion. The increments are like this: 100, 1000, 10000, .....
> Basicaly adding a zero each iteration. I'm having problems trying to
> do it. Can somebody help me
>
Probably better to use a 'while' loop instead, multiplying by 10 on
each iteration until the number exceeds 10 million.

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#68831

Thanks!! 

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#68829

On Mon, Mar 24, 2014 at 11:35 AM,  <pabloeruggeri@gmail.com> wrote:
> Hello,
>
> I'm trying to create a for loop that starts at 100 and goes to 10Mllion. The increments are like this: 100, 1000, 10000, ..... Basicaly adding a zero each iteration. I'm having problems trying to do it. Can somebody help me
>

That sounds like a logarithmic scale. Look at this:

>>> 10**2
100
>>> 10**3
1000
...
>>> 10**7
10000000

Do you know how to iterate from 2 to 7 inclusive?

ChrisA

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#68854

Chris Angelico <rosuav@gmail.com>:

> On Mon, Mar 24, 2014 at 11:35 AM,  <pabloeruggeri@gmail.com> wrote:
>> I'm trying to create a for loop that starts at 100 and goes to 10Mllion.
>
> That sounds like a logarithmic scale.

How about:

    for i in [ 100, 1000, 10000, 100000, 1000000, 10000000, 100000000 ]:
        ...


Marko

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#68856

On 24/03/2014 07:47, Marko Rauhamaa wrote:
> Chris Angelico <rosuav@gmail.com>:
>
>> On Mon, Mar 24, 2014 at 11:35 AM,  <pabloeruggeri@gmail.com> wrote:
>>> I'm trying to create a for loop that starts at 100 and goes to 10Mllion.
>>
>> That sounds like a logarithmic scale.
>
> How about:
>
>      for i in [ 100, 1000, 10000, 100000, 1000000, 10000000, 100000000 ]:
>          ...

Why the overhead of creating a list when you could use a tuple? :)

-- 
My fellow Pythonistas, ask not what our language can do for you, ask 
what you can do for our language.

Mark Lawrence

---
This email is free from viruses and malware because avast! Antivirus protection is active.
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#68861

Mark Lawrence <breamoreboy@yahoo.co.uk>:

> On 24/03/2014 07:47, Marko Rauhamaa wrote:
>>      for i in [ 100, 1000, 10000, 100000, 1000000, 10000000, 100000000 ]:
>
> Why the overhead of creating a list when you could use a tuple? :)

Once in college, we were given assembly programming assignments. The
textbook defined an imagined 18-bit CPU and an instruction set.

A fellow student was given the task to write a subroutine that
calculates the factorial of the argument. He went through the trouble of
creating a loop with multiplication etc. I argued (in vain) that his
solution is "wrong" from all angles; he should have implemented his
subroutine with a simple lookup table since 18 bits can only take a
handful of input values (0 through 8).


Marko

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#68868

On Mon, Mar 24, 2014 at 9:04 PM, Marko Rauhamaa <marko@pacujo.net> wrote:
> Once in college, we were given assembly programming assignments. The
> textbook defined an imagined 18-bit CPU and an instruction set.
>
> A fellow student was given the task to write a subroutine that
> calculates the factorial of the argument. He went through the trouble of
> creating a loop with multiplication etc. I argued (in vain) that his
> solution is "wrong" from all angles; he should have implemented his
> subroutine with a simple lookup table since 18 bits can only take a
> handful of input values (0 through 8).

The task was "calculates". If the task was "returns", then the lookup
table would be correct. :)

ChrisA

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#68830

On 24/03/2014 00:35, pabloeruggeri@gmail.com wrote:
> Hello,
>
> I'm trying to create a for loop that starts at 100 and goes to 10Mllion. The increments are like this: 100, 1000, 10000, ..... Basicaly adding a zero each iteration. I'm having problems trying to do it. Can somebody help me
>

Start by rereading this 
http://docs.python.org/3/tutorial/controlflow.html#for-statements, give 
it another go and if you have problems post your code inline here and 
we'll help you out.

-- 
My fellow Pythonistas, ask not what our language can do for you, ask 
what you can do for our language.

Mark Lawrence

---
This email is free from viruses and malware because avast! Antivirus protection is active.
http://www.avast.com

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#68832

for i in (10**p for p in range(3, 8)):
    print(i)

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#68844

On 3/23/14 7:59 PM, anton wrote:
> for i in (10**p for p in range(3, 8)):
>      print(i)

Never do their home-work for them; but, in this case, what the heck.

:)

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#68840

pabloeruggeri@gmail.com writes:

> I'm trying to create a for loop that starts at 100 and goes to
> 10Mllion. The increments are like this: 100, 1000, 10000, .....
> Basicaly adding a zero each iteration. I'm having problems trying to
> do it. Can somebody help me

Welcome.

What have you tried so far?

We're not in the practice of just writing the code for you; please show
us what you have written that we can try running it, and how it's
behaving differently from what you expect.

-- 
 \           “Oh, I love your magazine. My favorite section is ‘How To |
  `\          Increase Your Word Power’. That thing is really, really, |
_o__)                          really... good.” —Homer, _The Simpsons_ |
Ben Finney

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