Mastering Integer Manipulation in Python

Introduction

In this Python challenge, we will be working with integers and performing a mathematical operation on them.

Skills Graph

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Add Digits

Problem

Given an integer, we need to repeatedly add its digits until the result is a single digit. For example, if we are given the integer 138, we add 1 + 3 + 8 = 12. Since 12 is not a single digit, we repeat the process and add 1 + 2 = 3. Therefore, the final result is 3.

Requirements

To solve this problem, we need to consider the following requirements:

The input integer is not negative.
The inputs may not always be valid, so we need to handle any errors that may occur.
The solution should fit into memory.

Example Usage

Here are some examples of how this function can be used:

If we pass None as input, the function should raise a TypeError.
If we pass a negative integer as input, the function should raise a ValueError.
If we pass 9 as input, the function should return 9 since it is already a single digit.
If we pass 138 as input, the function should return 3.
If we pass 65536 as input, the function should return 7.

Summary

In this Python challenge, we learned how to perform a mathematical operation on integers and handle any errors that may occur. We also learned how to ensure that our solution fits into memory.

Integers Manipulation Python