Add Digits
Explore how to solve the Add Digits problem by summing the digits of an integer repeatedly until a single-digit number remains. Learn to apply a constant time O(1) method without using loops or recursion, focusing on efficient mathematical problem-solving techniques.
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We'll cover the following...
Statement
Given an integer num, repeatedly sum all of its digits until the resulting value is a single digit, then return that value.
Note: Could you solve this without any loop or recursion in
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