Why i in for loop only goes to even indices

Question

https://code.sololearn.com/c97T44oF1ItW/?ref=app

Answer 1

Your code calls for an iteration of range(8), but removes i, the iteration.
So, Range(8) = 0,1,2,3,4,5,6,7

1st iteration removes index[0].
Range is now = 1,2,3,4,5,6,7

2nd iteration removes index[1] which is now 2
Range is now = 1,3,4,5,6,7

3rd iteration removes index[2] which is now 4
Range is now 1,3,5,6,7

You see the pattern developing I hope.
Final line in code states:
print(sum(range)
Which is 1+3+5+7 =16

Answer 2

in will check the length of the list each iteration of the loop yet increments the index by 1 each time. The loop removes the element at that index and the list is shortened and updated prior to the next iteration of the loop. To understand better try using:

for index, element in enumerate(myl):
print(index, element, myl)
myl.remove(i)