Editing Digital sum

There are a number of common mathematical meanings of the term '''digital sum''':

== Values ==

* The '''[[digit sum]]''' - add the digits of the representation of a number in a given base. For example, considering 84001 in base 10 the digit sum would be 8&nbsp;+&nbsp;4&nbsp;+&nbsp;0&nbsp;+&nbsp;0&nbsp;+&nbsp;1&nbsp;=&nbsp;13.
* The '''[[digital root ]]''' - repeatedly apply the digit sum operation to the representation of a number in a given base until the outcome is a single digit. For example, considering 84001 in base 10 the digital root would be&nbsp;4 (8&nbsp;+&nbsp;4&nbsp;+&nbsp;0&nbsp;+&nbsp;0&nbsp;+&nbsp;1&nbsp;=&nbsp;13, 1&nbsp;+&nbsp;3&nbsp;=&nbsp;4).

== Operations ==

The mathematical operation [[digital sum in base b]] can also be called the digital sum. This is where each [[positional notation|place]] is summed independently, ignoring digit [[carry (arithmetic)|carry]]. For example, 84001&nbsp;+&nbsp;56734&nbsp;=&nbsp;(8&nbsp;+&nbsp;5&nbsp;=&nbsp;1'''3''')(4&nbsp;+&nbsp;6&nbsp;=&nbsp;1'''0''')(0&nbsp;+&nbsp;7&nbsp;=&nbsp;'''7''')(0&nbsp;+&nbsp;3&nbsp;=&nbsp;'''3''')(1&nbsp;+&nbsp;4&nbsp;=&nbsp;'''5''')&nbsp;=&nbsp;30735.

{{disambiguation}}
[[Category:Integers]]