N-Digits Calculator 🧮

🚀 Overview

Java's built-in numeric types have limitations:

• Long.MAX_VALUE: 9223372036854775807
• Integer.MAX_VALUE: 2147483647

But what if we need to handle much larger numbers beyond Long.MAX_VALUE?

🔹 Solution: Arbitrary Precision Using Linked Lists

This project represents large numbers using a doubly linked list, enabling n-digit number operations with no predefined limit.

For example, our calculator can handle:

922337203685477580712345 + 9221020560337203685477580712345
= 9221021482674407370955161424690

📌 Features

✔️ Supports addition (+), subtraction (-), multiplication (*), division (/), and modulus (%)

✔️ Handles arbitrarily large numbers

✔️ No reliance on Java’s BigInteger—custom data structure implementation

✔️ Command-line usage for quick calculations

🛠️ Usage

java -jar N-Digits-Calculator-all-1.0-SNAPSHOT.jar 30 + 40

java -jar N-Digits-Calculator-all-1.0-SNAPSHOT.jar 30 - 40

java -jar N-Digits-Calculator-all-1.0-SNAPSHOT.jar 30 * 40

java -jar N-Digits-Calculator-all-1.0-SNAPSHOT.jar 40 / 30

java -jar N-Digits-Calculator-all-1.0-SNAPSHOT.jar 40 % 30

📖 Background

This project originally started in 2015 as part of my Undergrad Data Structures course.
I encourage computer science students to implement similar projects as a great hands-on data structure exercise.