Caesar Cipher 🔐 – JavaScript CLI Project

This project was created as part of my Fullstack Web Development Bootcamp (June to November 2025, at WBS Coding School).
It’s a simple command-line tool that encrypts or decrypts a message using the classic Caesar Cipher algorithm.

---

🎯 Project Goals

• Understand JavaScript fundamentals
• Work with strings and characters
• Use functions, loops, and conditional logic
• Execute JavaScript code in the terminal (Node.js)
• Learn how to structure a small command-line project
• Practice using Git and GitHub for version control

---

🛠️ Technologies Used

• JavaScript (Vanilla JS)
• Node.js (console/terminal)
• Git & GitHub

---

📁 Project Structure

Caesar-Cipher/ ├── caesar-cipher.js # Main script containing Caesar Cipher logic └── README.md # Project documentation

yaml Kopieren Bearbeiten

---

🚀 How to Run the Project

1. Clone the repository:

#bash git clone https://github.com/AhmedOues93/Caesar-Cipher.git cd Caesar-Cipher Run the script with Node.js:

#bash Kopieren Bearbeiten node caesar-cipher.js

💡 Usage The program asks you whether you want to encrypt or decrypt a message.

Then you enter the message and the key (shift number).

The program outputs the transformed message in the console.

🔍 How It Works The Caesar Cipher is a simple substitution cipher where each letter in the plaintext is shifted by a fixed number of positions down the alphabet. For example, with a shift of 3:

A → D

B → E

C → F

... and so on.

This tool allows you to encrypt or decrypt messages using this method.

⚠️ Limitations Only supports English alphabet letters (A-Z, a-z).

Non-alphabet characters are not changed.

Case is preserved (uppercase stays uppercase, lowercase stays lowercase).

📫 Contact You can reach me via GitHub: AhmedOues93