Added Happy Number (fixes #1913)

[laxmikandivalasa]

📥 Pull Request

Description

Determine if a number is a "happy" number, where summing squares of digits eventually results in 1

Fixes #1913

Type of change

• Bug fix (non-breaking change which fixes an issue)
• [ X] New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

Checklist:

• [X ] My code follows the style guidelines of this project
• [X ] I have performed a self-review of my code
• [ X] I have commented my code, particularly in hard-to-understand areas
• [X ] I have added tests that prove my fix is effective or that my feature works
• [X ] New and existing unit tests pass locally with my changes
• [ X] Any dependent changes have been merged and published in downstream modules

[github-actions]

Thank you for submitting your pull request! 🙌 We'll review it as soon as possible.). If there are any specific instructions or feedback regarding your PR, we'll provide them here. Thanks again for your contribution! 😊

[github-actions]

⚡️ Lighthouse Report for the Deploy Preview of this PR 🚀

🔗 Site: Algo | Live Site

URL 🌐	Performance	Accessibility	Best Practices	SEO	📊
/algo/	🟡 58	🟢 96	🟡 71	🟡 86	📄
/algo/docs	🟡 50	🟢 96	🟡 75	🟢 100	📄
/algo/blog	🟡 66	🟢 92	🟢 96	🟡 86	📄

[laxmikandivalasa]

@ajay-dhangar can you check this pr!!

[laxmikandivalasa]

@ajay-dhangar Why did you close this Pr??