For Loop Question

In the following code, I'm trying to understand why N is not the first number in the list for each iteration, but instead is 1,3,5,7,9.

#Create a list of numbers
List  =  [1,2,3,4,5,6,7,8,9]

#Cycle through the list,
#each time removing the first number and printing the rest
for N in List:
    del List[0]
    print N, List

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Because you are removing it but the index still advances 1
So at 1, you print it and remove it (index is at 0)
Next iteration you now have 2,3,4 etc but the index has advanced to 1 which is now number 3.

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Try something like

while List:
	print List

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