Armstrong Number Checking

Armstrong Number Checking


In number theory, an Armstrong number (after Michael F. Armstrong) or narcissistic number in a given number base (10 for this mission) is a number that is the sum of its own digits each raised to the power of the number of digits. For example, 153 is an Armstrong number because 13 + 53 + 33 == 153.


Input: Integer (int).

Output: Logic value (bool).


assert is_armstrong(153) == True
assert is_armstrong(370) == True
assert is_armstrong(947) == False
assert is_armstrong(371) == True

How it’s used: this function can be employed in mathematical puzzles, encryption algorithms, and educational tools.

Invalid hot key. Each hot key should be unique and valid
Hot keys:
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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