Print out numbers of increasing distance from center value in Python












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I am trying to print out numbers by increasing positive and negative values around a center number, and I don't think I've found the best way. For example, say I want to find what number in a list my center value is closest to. I do that by adding one, see if it matches, then subtracting one from the original number and see if that matches, then add two from the original number and so on. I know there are other ways of finding the closest match but I'm not looking for that - I'm looking for the best way to print out numbers steadily getting farther from a center value. Here's my code:



def inc_val(center, i, neg_toggle):
mult = 1
if neg_toggle:
neg_toggle = False
mult = -1
else:
neg_toggle = True
mult = 1
i += 1
val = center + (i * mult)
return val, i, neg_toggle

i = 0
center = 24
val = center
neg_toggle = False
my_set = {30, 50, 90}
while val not in my_set:
print(val)
val, i, neg_toggle = inc_val(center, i, neg_toggle)


This prints out the following list, as desired:



24
25
23
26
22
27
21
28
20
29
19


To be clear, I'm interested in the incrementing numbers. The while not in my_set part is just to illustrate. I am not intentionally trying to re-invent anything, so if there's a built-in or simpler way to do this, please let me know.










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    0












    $begingroup$


    I am trying to print out numbers by increasing positive and negative values around a center number, and I don't think I've found the best way. For example, say I want to find what number in a list my center value is closest to. I do that by adding one, see if it matches, then subtracting one from the original number and see if that matches, then add two from the original number and so on. I know there are other ways of finding the closest match but I'm not looking for that - I'm looking for the best way to print out numbers steadily getting farther from a center value. Here's my code:



    def inc_val(center, i, neg_toggle):
    mult = 1
    if neg_toggle:
    neg_toggle = False
    mult = -1
    else:
    neg_toggle = True
    mult = 1
    i += 1
    val = center + (i * mult)
    return val, i, neg_toggle

    i = 0
    center = 24
    val = center
    neg_toggle = False
    my_set = {30, 50, 90}
    while val not in my_set:
    print(val)
    val, i, neg_toggle = inc_val(center, i, neg_toggle)


    This prints out the following list, as desired:



    24
    25
    23
    26
    22
    27
    21
    28
    20
    29
    19


    To be clear, I'm interested in the incrementing numbers. The while not in my_set part is just to illustrate. I am not intentionally trying to re-invent anything, so if there's a built-in or simpler way to do this, please let me know.










    share|improve this question









    $endgroup$















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      0








      0





      $begingroup$


      I am trying to print out numbers by increasing positive and negative values around a center number, and I don't think I've found the best way. For example, say I want to find what number in a list my center value is closest to. I do that by adding one, see if it matches, then subtracting one from the original number and see if that matches, then add two from the original number and so on. I know there are other ways of finding the closest match but I'm not looking for that - I'm looking for the best way to print out numbers steadily getting farther from a center value. Here's my code:



      def inc_val(center, i, neg_toggle):
      mult = 1
      if neg_toggle:
      neg_toggle = False
      mult = -1
      else:
      neg_toggle = True
      mult = 1
      i += 1
      val = center + (i * mult)
      return val, i, neg_toggle

      i = 0
      center = 24
      val = center
      neg_toggle = False
      my_set = {30, 50, 90}
      while val not in my_set:
      print(val)
      val, i, neg_toggle = inc_val(center, i, neg_toggle)


      This prints out the following list, as desired:



      24
      25
      23
      26
      22
      27
      21
      28
      20
      29
      19


      To be clear, I'm interested in the incrementing numbers. The while not in my_set part is just to illustrate. I am not intentionally trying to re-invent anything, so if there's a built-in or simpler way to do this, please let me know.










      share|improve this question









      $endgroup$




      I am trying to print out numbers by increasing positive and negative values around a center number, and I don't think I've found the best way. For example, say I want to find what number in a list my center value is closest to. I do that by adding one, see if it matches, then subtracting one from the original number and see if that matches, then add two from the original number and so on. I know there are other ways of finding the closest match but I'm not looking for that - I'm looking for the best way to print out numbers steadily getting farther from a center value. Here's my code:



      def inc_val(center, i, neg_toggle):
      mult = 1
      if neg_toggle:
      neg_toggle = False
      mult = -1
      else:
      neg_toggle = True
      mult = 1
      i += 1
      val = center + (i * mult)
      return val, i, neg_toggle

      i = 0
      center = 24
      val = center
      neg_toggle = False
      my_set = {30, 50, 90}
      while val not in my_set:
      print(val)
      val, i, neg_toggle = inc_val(center, i, neg_toggle)


      This prints out the following list, as desired:



      24
      25
      23
      26
      22
      27
      21
      28
      20
      29
      19


      To be clear, I'm interested in the incrementing numbers. The while not in my_set part is just to illustrate. I am not intentionally trying to re-invent anything, so if there's a built-in or simpler way to do this, please let me know.







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      asked 20 mins ago









      jss367jss367

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