python tutorial #6: Loop

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DATE: Dec. 16, 2013, 8:39 a.m.

FORMAT: Python

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  1. # loop
  2. # display n to 1
  3. n = 5
  4. # 'C'
  5. # while(n)
  6. # {
  7. # printf("%d\n", n);
  8. # --n;
  9. # }
  10. # Python
  11. # leader:
  12. # suite
  14. n = 5
  15. while n :
  16. print(n)
  17. n -= 1
  19. # infinte loop
  20. #n = 5
  21. #while n :
  22. # print(n)
  23. #n -= 1
  25. # ok
  26. n = 5
  27. while n :
  28. print(n)
  29. n -= 1
  31. # indentation by tab
  32. n = 5
  33. while n :
  34. print(n)
  35. n -= 1
  37. # comibination of tab and spaces : not reco; error in 3.x
  38. #n = 5
  39. #while n :
  40. # print(n)
  41. # n -= 1
  43. # reco: 4 spaces for indentation
  45. a = [
  46. ["dhoni", 80, 40, 50 ],
  47. ["kohli", 20, 100, 30 ],
  48. ["raina", 78, 52, 33 ],
  49. ["sehwag", 200, 0,9]
  50. ]
  51. # len : polymorphic
  52. print("\n","size : ", len(a))
  53. i = 0
  54. while i < len(a) :
  55. print(a[i][0])
  56. j = 1
  57. total = 0
  58. while j < len(a[i]) :
  59. total += a[i][j]
  60. j += 1
  61. i += 1
  62. print(total)
  64. #increase indention for suite wrt leader
  65. # can increase indentation following the leader
  66. # when decreasing indentation, it should match the
  67. # indentation of some earlier stmt
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