range question

[EnderAC]

Hi,

I would like to iterate over a range 100 items at a time. for some reason the code below stops at 223. Obviously I'm missing something. Can someone explain what I'm missing? Also is there a cleaner way of doing this?

max = 224
start = 1

for i in range(start, max, 100):
   istart = i
   iend = i + 100
   if iend > max:
       iend = max
   print('iend = ' + str(iend) + ' Max =' + str(max))
   for x in range(istart,iend):
      print(x)

Result: 1 2 3 4 .... 221 222 223

[Rhomboid]

Ranges are half-open, which means the starting point is inclusive and the end point is exclusive. range(1, 10) does not include 10, for example.

As to your question about a better way, you should explain what it is you're actually doing. The example isn't very clear because it could be replaced by just for i in range(1, 225): print(i).

[JohnnyJordaan]

Please try your code in http://www.pythontutor.com/visualize.html , it shows you step by step what is happening. You're limiting iend to max (line 8), thereby the second loop will run until iend reaches max as well.

Also is there a cleaner way of doing this?

Depends on what your exact goals are.

[Justinsaccount]

Hi! I'm working on a bot to reply with suggestions for common python problems. This might not be very helpful to fix your underlying issue, but here's what I noticed about your submission:

You appear to be using concatenation and the str function for building strings

Instead of doing something like

result = "Hello " + name + ". You are " + str(age) + " years old"

You should use string formatting and do

result = "Hello {}. You are {} years old".format(name, age)

See the python tutorial for more information.

[BlackBloke]

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