## Description

**As per Wiki, **

Happy Number – A **happy number** is a **number** defined by the following process: Starting with any positive integer, replace the**number** by the sum of the squares of its digits, and repeat the process until the **number** either equals 1 (where it will stay), or it loops endlessly in a cycle that does not include 1, 7, 10, 13, 19, 23, 28, 31, 32, 44, 49, 68, 70, 79, 82, 86, 91, 94, 97, 100..

Sad Number – An **unhappy number** is a **number** that is not happy, i.e., a **number** such that iterating this sum-of-squared-digits map starting with never reaches the **number** 1. The first few **unhappy numbers** are 2, 3, 4, 5, 6, 8, 9, 11, 12, 14, 15, 16, 17, 18…

## Program

## Output

**Case 1**

`Enter the number:`

10

Happy

**Case 2**

`Enter the number:`

18

Sad