In number theory, a happy number is a number which eventually reaches 1 when replaced by the sum of thesquare of each digit. For instance, 13 is a happy number because12 + 3? = 10 and 1² + o² = 1.On the other hand, 4 is not a happy number because the sequence starting with4 = 16 and 12 + 62² = 37and eventually reaches to 4 that is the number that started the sequence, and so the process continues in aninfinite cycle without ever reaching 1.Write, Compile and Execute a Java method that computes whether a given number is happy or sad.

public static int HappyNumber(int num){ int rem = 0, sum = 0;…

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Write, Compile and Execute a Java method that computes whether a given number is happy or sad.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

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Question

In number theory, a happy number is a number which eventually reaches 1 when replaced by the sum of the
square of each digit. For instance, 13 is a happy number because
12 + 3? = 10 and 1² + o² = 1.
On the other hand, 4 is not a happy number because the sequence starting with
4 = 16 and 12 + 62² = 37
and eventually reaches to 4 that is the number that started the sequence, and so the process continues in an
infinite cycle without ever reaching 1.
Write, Compile and Execute a Java method that computes whether a given number is happy or sad.

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