🔐 Secret Code Generator

This repository contains a simple yet effective Secret Code Generator written in Python. The program allows users to encode a plain text message into a secret code and decode it back to its original form using a Caesar cipher algorithm.

This project is a great exercise for practicing fundamental Python concepts, including functions, loops, string manipulation, and user input handling.

📊 Features

• Encode & Decode: Easily transform messages into secret code and back again.
• Caesar Cipher Logic: Uses a substitution cipher where each letter is shifted by a specified number of places in the alphabet.
• Case Handling: Correctly handles both uppercase and lowercase letters.
• Character Support: Ignores non-alphabetic characters like spaces, numbers, and punctuation, leaving them unchanged.
• Alphabet Wrapping: Supports wrapping around the alphabet (e.g., shifting 'Z' by 2 results in 'B').
• Interactive Menu: A simple command-line menu allows the user to choose between encoding, decoding, or exiting the program.

🚀 How It Works

The program takes a message and a numerical "shift" value. For encoding, it shifts each letter forward in the alphabet by the shift value. For decoding, it performs the reverse operation.

Example:

• Original Message: Hello World!
• Shift Value: 3
• Encoded Message: Khoor Zruog!

💻 How to Use

1. Clone this repository to your local machine:

   git clone <your-repository-url>

2. Navigate to the project directory:

   cd <repository-name>

3. Run the script from your terminal:

   python Secret_Code_Generator.py 

   (Note: You'll need to save the notebook code as a .py file or run it within a Jupyter environment.)

4. Follow the on-screen instructions to either encode or decode a message.

   === Secret Code Generator ===
   
   Choose an option:
   1. Encode a message
   2. Decode a message
   3. Exit
   Enter your choice (1/2/3): 1
   Enter the message to encode: Hello World!
   Enter shift value (e.g., 2): 3
   Encoded message: Khoor Zruog!
   

🛠️ Functions Defined

The program is structured around three main functions:

• encode_message(message, shift): Takes a string and an integer shift to produce the encoded message.
• decode_message(message, shift): Reverses the encoding process by shifting letters backward.
• menu(): Provides the main user interface for interacting with the program.

🔧 Technologies Used

• Python 3: The entire program is written in standard Python, with no external libraries required.