Add Digits
Explore how to repeatedly sum the digits of an integer until a single digit result is achieved using a mathematical formula. Learn to solve this efficiently in constant time without loops or recursion, enhancing your problem-solving skills for coding interviews.
We'll cover the following...
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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