Find the sum of individual digits in a array

Quote:

You have to find the sum of the individual digit sum of all the elements in the array

Googling "get digits from integer" gives only 21 millions of answers, lets guess you can find useful in them.
The key is to use an integer division
I = T * 10 + U where Integer is made of 10 times Tens plus Unit.
Or T is result of integer division of I by 10, and U is reminder of division.
You need to search for integer division and reminder of integer division (modulo).

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