🚀 Completing Devlog — Scientific Calculator (Python + Flask)
📌 Project Overview

This project is a Scientific Calculator web app built using Python and Flask.
It supports:

Arithmetic operations

Trigonometric functions

Logarithms

Statistical calculations (mean, median, mode, max, min)

The goal of this project was to take a Python CLI program and turn it into a real web application, then deploy it online.

🧠 What I Built

A core calculator module (scientific_calculator.py) containing all math logic

A Flask backend (app.py) to connect Python with HTML

A simple and clean frontend using HTML & CSS

A live deployed app using Render

This was my first full end-to-end project: code → web → deploy.

🧗 Challenges I Faced
1️⃣ Converting CLI Python to Web
2️⃣ Deployment Errors (Big Learning)
🌐 Deployment

After that, the app went live successfully 🎉

🔗 Links

Live Demo: 👉 https://scientific-calculator-0ux0.onrender.com

GitHub Repo: 👉 https://github.com/anindasadhukhan-hackclub/scientific-calculator

🔜 What’s Next?

Improve UI (better layout, dark mode)

Add calculation history

Convert frontend to React

Add keyboard support

🙌 Final Thoughts

This project taught me more than tutorials ever could.
Seeing my Python code run on the internet was an amazing feeling.

Excited to build more with Hack Club 🚀💙

Quadratic Equation Solver 🧮

A simple Quadratic Equation Solver built using Python.
The program calculates the roots of a quadratic equation of the form:

ax² + bx + c = 0

This project was built as part of my learning journey and as my next project after frontend web apps.

✨ Features

• Takes user input for coefficients a, b, and c
• Calculates the discriminant
• Handles:
  • Two real roots
  • One real root
  • Complex roots
• Displays results clearly
• Beginner-friendly Python code

🛠️ Technologies Used

• Python 3
• math module

▶️ How to Run the Program

1. Make sure Python is installed (python --version)
2. Clone this repository or download the files
3. Run the program using:

   python quadratic_solver.py

🚀 Why I built this project

After completing my first project (Tic Tac Toe), I wanted to build something that helped me understand real-world JavaScript logic and DOM manipulation more clearly.
A calculator felt like the perfect next step — simple, useful, and logic-driven.

🧩 What I built

I built a simple browser-based calculator that can:

Perform basic arithmetic operations (+, −, ×, ÷)

Clear the display

Delete the last entered value

Handle decimal numbers

Show errors for invalid expressions

The entire project runs purely on the frontend, without any libraries or frameworks.

🧠 What I learned

This project helped me understand:

How JavaScript connects with HTML using the DOM

How button click events work

How to update UI dynamically

How CSS Grid helps create clean layouts

How to structure a small project properly

I also learned how small bugs (like invalid expressions) can break logic — and how to handle them safely.

⚠️ Challenges I faced

Managing user input correctly

Preventing crashes when expressions are invalid

Designing a clean UI with proper spacing

Making sure the calculator feels intuitive

Solving these issues improved my debugging skills and confidence.

🌱 What I’ll improve next

Add keyboard input support

Build a version without using eval()

Add a dark/light theme toggle

Store calculation history

🙌 Final thoughts

This project may look simple, but it taught me a lot about thinking logically, breaking problems into steps, and building complete working software.

On to the next project 🚀

Thanks, Hack Club, for motivating me to learn by building!

I’m working on my first project! This is so exciting. I can’t wait to share more updates as I build.