Happy Number Checker

See inside

Press the space bar or green flag to see if a number is a happy number!

Notes and Credits

1Happy numbers are numbers which come out of the process of squaring their digits, and then adding them up. Let's take 7 as an example:


We then do the same with 49:


We keep on taking these numbers and doing the same thing to them until we either reach 1 (in which case it is a happy number) or are stuck in a cycle (in which case it is an unhappy number)

Shared: 27 Feb 2015 Modified: 15 Sep 2016
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