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Can there be negative Armstrong numbers? #2302

Closed m-charlton closed 1 year ago

m-charlton commented 1 year ago

At present there are no test cases which use negative integers for the 'Is an Armstrong number' exercise.

This wikipedia article, the same one referenced in the problem description, would seem to imply that Armstrong numbers can be negative.

If negative numbers are legal or not. Either way do the test cases need updating?

Any mathematicians out there with a definitive answer?

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