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minimallinux Group Title

Anyone know why I am getting an endless loop ? http://codepad.org/Q9UuBR1l

  • 2 years ago
  • 2 years ago

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  1. rambo2210 Group Title
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    because first while loop is continuestly exicuting:- while(balance > 0): balance = 4213 mmp += 10 it will never come out. balance value will never get down to 0.

    • 2 years ago
  2. Chris2332 Group Title
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    That's not correct. It has nothing to do with the outer loop. It has to do with the fact that on the second iteration of the outer loop, the "m" variable is not reset. Therefore the second while loop is not executed! What he is doing, by resetting the balance is totally correct!

    • 2 years ago
  3. MicroBot Group Title
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    What @Chris2332 says is very right! -You have your inner while loop to repeat the months round. -OK -You have the iteration control variable ,set and changing.-OK -What you dont have, is that same variable reseting in your outter loop so that you can run it again on your next try to find the mmp. Means that ,on your next try ,where you have mmp raising you will have m=13 from your last iteration round and that will not enter inner while loop. Hope that helps!:)

    • 2 years ago
  4. minimallinux Group Title
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    I reset it but still no joy http://codepad.org/pZwfvY9j

    • 2 years ago
  5. Chris2332 Group Title
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    Why at the end of your inner loop are you resetting the mmp?

    • 2 years ago
  6. rambo2210 Group Title
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    No need to reset mmp. both the while loops are depend on blance and m values.

    • 2 years ago
  7. minimallinux Group Title
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    Of course, it is a throwback to the original from 1st problem when it was the minimum payment, but not needed on this

    • 2 years ago
  8. Chris2332 Group Title
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    Guys... I've said it a million times... solve the problem on paper and then move on to programming. If you don't understand the solution to the problem, how do you expect to write the code to solve it?

    • 2 years ago
  9. MicroBot Group Title
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    An other thing, not error generating ,but important : line 7 : u have inizialized m=1. OK but since you are doing this in the while loop ,there it is no more needed. HElps you keep your code cleaner and more readable.

    • 2 years ago
  10. rambo2210 Group Title
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    If you would like to run it once then try this code:- balance = 4213 annualInterestRate = 0.2 monthlyPaymentRate = 0.04 monthlyInterestRate = annualInterestRate/12 mmp = 10 paid = 0 m = 1 if (balance !=0): balance = 4213 mmp += 10 while(m <=12): m += 1 balance = (balance - mmp)*(1 + monthlyInterestRate) paid = mmp + paid mmp = monthlyPaymentRate*balance print 'Total paid: ',round(paid,2) print 'Remaining balance: ',round(balance,2)

    • 2 years ago
  11. rambo2210 Group Title
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    It is helpful??

    • 2 years ago
  12. minimallinux Group Title
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    Yes that seems to work , Thanks

    • 2 years ago
  13. minimallinux Group Title
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    I am only a beginner so do not have much real world experience at thinking up methods

    • 2 years ago
  14. MicroBot Group Title
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    @rambo2210 mate seriously do you know you are not supposed to give out the answer before the PS is due?-.-

    • 2 years ago
  15. rambo2210 Group Title
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    It is very ok.:-) feel free to ask you question here. BTW, I dont know phython. but I have programming skill so I could solve you problem.

    • 2 years ago
  16. minimallinux Group Title
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    Doesn't pass grader but I will keep trying

    • 2 years ago
  17. rambo2210 Group Title
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    @MicroBot what ?? I did not get you.

    • 2 years ago
  18. minimallinux Group Title
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    Doesn't pass grader though seems to work fine

    • 2 years ago
  19. MicroBot Group Title
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    you gave him the whole code and thats is not allowed ...he is supposed to resolve it alone....help is ok as we all need help to understand things but like this ..... From: https://www.edx.org/static/content-mit-600x~2012_Fall/handouts/Collaboration_guidelines.7c42c319b037.pdf "It is not ok to post answers to lecture and problem set problems before the submission deadline."

    • 2 years ago
  20. MicroBot Group Title
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    @minimallinux keep trying mate!im sure you can do it you just need a clean head .What i do is when i resolve a step i had problem with...i take a break...do smthing different....dunno go make a tea or a coffe and the return to next problem i have!:) helps a lot

    • 2 years ago
  21. minimallinux Group Title
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    Seems others more experienced have problems with this one too

    • 2 years ago
  22. rambo2210 Group Title
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    @MicroBot Oops. I m really very sorry for this. I did not know this. Please forgive me.

    • 2 years ago
  23. MicroBot Group Title
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    Not for me to forgive you:) Just ppl have to keep in mind what is fair and what it not!:)

    • 2 years ago
  24. MicroBot Group Title
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    @minimallinux well i know whatis the problem but u have to promise me that you will spend time to understand the version that rambo gave you before sending it!

    • 2 years ago
  25. rambo2210 Group Title
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    @MicroBot from where I will find all this problems I also want to solve.

    • 2 years ago
  26. MicroBot Group Title
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    balance = 4213 annualInterestRate = 0.2 those 2 you mustnt initialize them as the EdX tester has its own way to give values to your variables. just delete it and send without it!

    • 2 years ago
  27. MicroBot Group Title
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    @rambo2210 check EdX page https://www.edx.org/dashboard MITx: 6.00x Introduction to Computer Science and Programming you have still time to start it and do in time the PS1 that is due on monday. GL

    • 2 years ago
  28. minimallinux Group Title
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    I already removed them before submitting, so I don't know why it fails, but anyway I have to try to go over it myself, just submitting something already done serves no purpose.

    • 2 years ago
  29. minimallinux Group Title
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    In fairness, the inner loop is my own code anyway, its just the outer loop, I probably wouldn't have got that at present

    • 2 years ago
  30. rambo2210 Group Title
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    Good keep it up.. you will get you answer soon.

    • 2 years ago
  31. MicroBot Group Title
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    Well mini if you believe that ,for loop is better or more understanding ,you sure can and should use it...its enough that you understand what you are writing. Thats all!

    • 2 years ago
  32. minimallinux Group Title
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    It is not right anyway, the program asks for the lowest payment which clears the balance, and the notes recommend using a while loop, I was probably on the right track previously

    • 2 years ago
  33. Chris2332 Group Title
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    Solve it on paper first!

    • 2 years ago
  34. minimallinux Group Title
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    This course is hard !

    • 2 years ago
  35. Chris2332 Group Title
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    Come on mate... it's the first couple of lectures...it's not hard. You just want to find a quick solution without understanding everything. Be focused and you ll be ok!

    • 2 years ago
  36. minimallinux Group Title
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    Yes, you are right, quick solution is no good

    • 2 years ago
  37. MicroBot Group Title
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    What @Chris2332 means, is that when you do it on paper ,1st you have infinite possibilities to edit and build and design and think over your code!When you write directly into the editor you are ,subconciously ,scared to make a mistake cause you would have a hard time retyping other things and this does not unfold your mind ...it does not let you concentrate on the problem but on the use of python.....

    • 2 years ago
  38. minimallinux Group Title
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    I find it hard to work out on paper as I have not presently sufficient knowledge t o ascertain what everything is going to do, but I will work on it. I have done a new version which comes up with the correct end result but does some strange things in the meantime like increasing the balance alarmingly before somehow correcting it Its here http://codepad.org/2gw0bTcD

    • 2 years ago
  39. minimallinux Group Title
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    Doesn't pass the checker

    • 2 years ago
  40. MicroBot Group Title
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    1st of all: (i know its only initialized not used anywhere but why u keep the monthlypayment rate in ur code anyway?

    • 2 years ago
  41. minimallinux Group Title
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    Thats left over from previous section needs to remove Thanks

    • 2 years ago
  42. minimallinux Group Title
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    Cant see why the balance goes up, print is there to check that, its not needed for checker

    • 2 years ago
  43. MicroBot Group Title
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    plus....remove all extra print outs....u have to have the output they ask u to have. ill check now about balance.

    • 2 years ago
  44. rambo2210 Group Title
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    still you have not got the output? may I help u.?

    • 2 years ago
  45. rambo2210 Group Title
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    can you just post the question here so that I can give some help.

    • 2 years ago
  46. minimallinux Group Title
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    Just done a new version which gives correct result but doesn't pass checker and does some strange things with the balance before seemingly fixing them http://codepad.org/spD9OZ1u

    • 2 years ago
  47. MicroBot Group Title
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    while(balance > 0): balance = 3926 this gives u the problem too as when u send it for checking no matter what they put to be balance ...u always set it to 3926....assign balance value to smthing else.

    • 2 years ago
  48. minimallinux Group Title
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    No in checker that is removed and not set as per usual

    • 2 years ago
  49. minimallinux Group Title
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    OK I see that I should set balance = balance in loop instead of 3926

    • 2 years ago
  50. MicroBot Group Title
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    how about smthing like this?: target_balance=balance

    • 2 years ago
  51. MicroBot Group Title
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    the fact that at start ur rem balance raises is that the 1st payment tests are too low and with the monthly interest rate added it goes up. so its normal.

    • 2 years ago
  52. rambo2210 Group Title
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    guys I have the sollution. but dont know how to show you that as @MicroBot told me not to post code here.

    • 2 years ago
  53. minimallinux Group Title
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    OK got that

    • 2 years ago
  54. minimallinux Group Title
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    Just give a hint

    • 2 years ago
  55. minimallinux Group Title
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    AT what area I should be looking at

    • 2 years ago
  56. rambo2210 Group Title
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    ok. so you are talking about why are you getting -30.5 rgt?

    • 2 years ago
  57. minimallinux Group Title
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    No we were talking about raised balances but that is normal, I took out the print statements and now I am getting the wrong outcome !! http://codepad.org/WezAh8ef (should be 360)

    • 2 years ago
  58. MicroBot Group Title
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    nop the problem says that it is normal to get a negative number as u r raising the payment by staps of 10.and i assure u it is legal for the checker aswell. what he asks is that ata start the remaining balance starts to become bigger instead of becoming lower .And that is normal too if u manually try to calculate the rem balance at low payment numbers.

    • 2 years ago
  59. MicroBot Group Title
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    because u set balance=balance

    • 2 years ago
  60. minimallinux Group Title
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    So I can set it to ?

    • 2 years ago
  61. minimallinux Group Title
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    I must be close to this now

    • 2 years ago
  62. MicroBot Group Title
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    u can say i wrote u above x=balance and use that as a new variable. or smthing = balance:)

    • 2 years ago
  63. MicroBot Group Title
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    u can set it to as i wrote above*

    • 2 years ago
  64. rambo2210 Group Title
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    ok so here is the hint. the problem is with 2nd loop. 2nd loop will run for 12 times rgt? and you are checking the condition after that loop. try using condition in side 2nd loop..

    • 2 years ago
  65. rambo2210 Group Title
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    Hope that rings a bell for you.

    • 2 years ago
  66. MicroBot Group Title
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    w8 sec stop everything u are doing xD

    • 2 years ago
  67. rambo2210 Group Title
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    @MicroBot you know the solution rgt?

    • 2 years ago
  68. rambo2210 Group Title
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    you know that where he is doing the mistake?

    • 2 years ago
  69. rambo2210 Group Title
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    I am getting the final print as follow:- Remaining balance: 330 Lowest Payment: 360 Is it correct??

    • 2 years ago
  70. MicroBot Group Title
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    mini stop doing this exercise for 5-10 mins...go do smthing else that has nothing to do with programming....cause now while we give u a mill of hints and suggestions u r trying to figure it out with our heads not with urs...clean ur head and ull understand im sure..then return to it and see it with new eyes!please do so!

    • 2 years ago
  71. minimallinux Group Title
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    Yes will do its become confusing I was very close to this one

    • 2 years ago
  72. MicroBot Group Title
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    @rambo yes i do know the solution but he needs a break!

    • 2 years ago
  73. rambo2210 Group Title
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    yeap you are right. @MicroBot

    • 2 years ago
  74. rambo2210 Group Title
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    @MicroBot I am getting the final print as follow:- Remaining balance: 330 Lowest Payment: 360 Is it correct??

    • 2 years ago
  75. minimallinux Group Title
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    I get 360 if i set balance = 3926 in inner loop

    • 2 years ago
  76. MicroBot Group Title
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    @rambo2210 based on his program im getting lowest payment 360 and rem balance -30.5...negative rem balance is fine for the solution.

    • 2 years ago
  77. minimallinux Group Title
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    having a rest for a bit this is what I've got http://codepad.org/FNCkLfJy

    • 2 years ago
  78. minimallinux Group Title
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    but doesnt pass checker because of value 3926 in inner loop I beliave

    • 2 years ago
  79. MicroBot Group Title
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    it is right but u have to adjust ur code to be readable by their checking program. ur program as it is now works only for balance =3926 unles u manualy change it from inside. (think of it as a user not a developer)

    • 2 years ago
  80. MicroBot Group Title
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    mini go rest !xD

    • 2 years ago
  81. minimallinux Group Title
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    Yip

    • 2 years ago
  82. rambo2210 Group Title
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    So got you solution?

    • 2 years ago
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