Digital root is the recursive sum of all the digits in a number. Given n, take the sum of the digits of n. If that value has more than one digit, continue reducing in this way until a single-digit ...
#SINGLE-DIGIT NUMBERS W/ NOTHING SEPARATING THEM. #PROGRAM SHOULD DISPLAY THE SUM OF ALL SINGLE DIGIT NUMBERS IN THE STRING. #FOR EXAMPLE, IF USER ENTERS 2514, THE METHOD SHOULD RETURN 12, WHICH IS ...