Even the Last Even the Last

You are given an array of integers. You should find the sum of the integers with even indexes (0th, 2nd, 4th...). Then multiply this summed number and the final element of the array together. Don't forget that the first element has an index of 0.

For an empty array, the result will always be 0 (zero).

Input: A list of integers.

Output: The number as an integer.


assert checkio([0, 1, 2, 3, 4, 5]) == 30
assert checkio([1, 3, 5]) == 30
assert checkio([6]) == 36
assert checkio([]) == 0

How it is used: Indexes and slices are important elements of coding. This will come in handy down the road!

Precondition: 0 ≤ len(array) ≤ 20
all(isinstance(x, int) for x in array)
all(-100 < x < 100 for x in array)

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CheckiO Extensions

CheckiO Extensions allow you to use local files to solve missions. More info in a blog post.

In order to install CheckiO client you'll need installed Python (version at least 3.8)

Install CheckiO Client first:

pip3 install checkio_client

Configure your tool

checkio --domain=py config --key=

Sync solutions into your local folder

checkio sync

(in beta testing) Launch local server so your browser can use it and sync solution between local file end extension on the fly. (doesn't work for safari)

checkio serv -d

Alternatevly, you can install Chrome extension or FF addon

checkio install-plugin
checkio install-plugin --ff
checkio install-plugin --chromium

Read more here about other functionality that the checkio client provides. Feel free to submit an issue in case of any difficulties.

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