CODEWITHSUNDEEP
pythonpython-3.xlistfor-loop
Harsha Witharana
Harsha Witharana

Reputation: 1

How does mentioned output get? please explain the code

arr = [1, 2, 3, 4, 5, 6]
for i in range(1, 6):
    arr[i - 1] = arr[i]
for i in range(0, 6): 
    print(arr[i], end = " ")

Answer is :2 3 4 5 6 6

Upvotes: 0

Views: 76

Answers (2)

gregory saliba
gregory saliba

Reputation: 21

if you are refering to get the following result : 2 3 4 5 6 1 then you should rearrange the following way:

for i in range(0, 6):
     arr[i-1] = arr[i]

that way, you start with arr[-1] = arr[0], so 6 will be replaced with 1 and so the code goes on

Upvotes: 0

Adon Bilivit
Adon Bilivit

Reputation: 27105

This is your code:

arr = [1, 2, 3, 4, 5, 6]
for i in range(1, 6):
    arr[i - 1] = arr[i]
for i in range(0, 6): 
    print(arr[i], end = " ")

arr is a list comprised of 6 integers.

In your first for loop, i will vary from 1 to 5 (inclusive).

Python lists are accessed using base-0 - i.e., the first element is at index zero, the second at 1 and so on.

Therefore your loop is moving every element to the position (index) that immediately precedes it. Nothing is moved into index 5

Upvotes: 1

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