Thread: Natural Loop Varible

  1. #1
    Registered User Queatrix's Avatar
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    Apr 2005

    Natural Loop Varible

    When I write a loop, I always naturaly use the varible n.a. I know it seems wierd but quite a while ago, I wrote
    struct LOOP { int a, c, d, e, f, g; }; LOOP n;
    in my program for loops becuase I already had a being used as a string, and now it's stuck with me, and I have and use it in practicly ALL my programs. Whats your natural loop varible?

  2. #2
    C++ Witch laserlight's Avatar
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    Oct 2003
    Not to be egotistical or anything, but it is i.
    Quote Originally Posted by Bjarne Stroustrup (2000-10-14)
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  3. #3
    Ethernal Noob
    Join Date
    Nov 2001
    i. if it's nested, j k l etc.

    If it's an iterator I use some name to indicate it's an iterator to a type of data structure

  4. #4
    Hurry Slowly vart's Avatar
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    Oct 2006
    Rishon LeZion, Israel
    index, callNum, session, etc depending on object type I'm iterating
    All problems in computer science can be solved by another level of indirection,
    except for the problem of too many layers of indirection.
    David J. Wheeler

  5. #5
    Fear the Reaper...
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    Aug 2005
    Toronto, Ontario, Canada
    i, j, k, l for loops. iter, iter2, iter3 for iterators.
    Teacher: "You connect with Internet Explorer, but what is your browser? You know, Yahoo, Webcrawler...?" It's great to see the educational system moving in the right direction

  6. #6
    Frequently Quite Prolix dwks's Avatar
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    Apr 2005
    x, y, z and then sometimes a, b etc or rarely i and j. (Usually I don't have that many loops though.)

    I must say that Queatrix's loop variables are probably unique.

    There was a thread much like this a while ago . . . maybe it got lost in the board restore.

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  7. #7
    The superhaterodyne twomers's Avatar
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    Dec 2005
    i normally. However, depending on the order of nesting it will start with k or j. Then it goes into ii, ij, ik, ji, jj, jk ... I think ye get the idea.

    I made that up. Sorry.

    i, j, k .... I use single letter variables for my iterator thingys, or a c for a colouring class, m for a menu class, and a d for a default class. To be honest if I have to use i, j, k, l (here I would run into problems), and one more I should probably have to rethink the code I'm writing.

  8. #8
    Registered User
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    Dec 2005
    i used to use count, count2, count3, etc..
    but that took too long to type
    i changed to i and j, i never nested more than 2 for loops since that change

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  9. #9
    Deathray Engineer MacGyver's Avatar
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    Mar 2007
    i, j, k. Very rarely will I do other index variables for loops, at least not for for loops.

  10. #10
    Registered User
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    Jan 2005
    I would use i, j, k if there was no context or for examples, but that rarely happens. I find myself using index a lot since most of my integer for loops involve indexes in an array-style container. I also use current_[object name] for iterators. Anything else I try to give explicit variable names as well, just like any other variable.

  11. #11
    Super Moderator VirtualAce's Avatar
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    Aug 2001
    i for single for loops.

    j,k,l for nested for loops.

    index, offset for non-for loops.

  12. #12
    Supermassive black hole cboard_member's Avatar
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    Jul 2005
    Always i for single, j,k,l for nested (I've never gotten to m, thankfully).
    Good class architecture is not like a Swiss Army Knife; it should be more like a well balanced throwing knife.

    - Mike McShaffry

  13. #13
    Its hard... But im here swgh's Avatar
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    Apr 2005
    There was a thread much like this a while ago . . . maybe it got lost in the board restore.
    That was my thread. It was a little while back. I asked if i j and k variable names were taken from the Fortran language. I think Prelude said I was correct, but all variables have been this way. Hmm, I remember using short variable names when I used to code in BASIC for the Acorn systems back in the early 90's. I miss this:

    LET A = 200
    ahh, memories... :P
    Double Helix STL

  14. #14
    Registered User hk_mp5kpdw's Avatar
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    Jan 2002
    Northern Virginia/Washington DC Metropolitan Area
    Usually i, j, k... although many times I'll use loop, loop1, loop2, etc..
    "Owners of dogs will have noticed that, if you provide them with food and water and shelter and affection, they will think you are god. Whereas owners of cats are compelled to realize that, if you provide them with food and water and shelter and affection, they draw the conclusion that they are gods."
    -Christopher Hitchens

  15. #15
    Registered User
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    Sep 2001
    Using i, j, k as index variables is older than programming. Those are the standard indexing variables for math proofs as well.
    Callou collei we'll code the way
    Of prime numbers and pings!

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