Digital root: Difference between revisions

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<pre>
670033 has additive persistence 3 and digital root 1
39390 has additive persistence 2 and digital root 6
588225 has additive persistence 2 and digital root 3
393900588225 has additive persistence 2 and digital root 9
</pre>
=={{header|Erlang}}==
=={{header|Erlang}}==
Using [[Sum_digits_of_an_integer]].
Using [[Sum_digits_of_an_integer]].