🔐 Caesar Cipher CLI Tool

A simple Python command-line tool to encrypt and decrypt messages using the Caesar Cipher algorithm.

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📖 About

The Caesar Cipher is one of the oldest and simplest encryption techniques.
It works by shifting each letter in the message by a fixed number of positions in the alphabet.

• Supports both encryption and decryption
• Preserves uppercase and lowercase letters
• Keeps numbers, spaces, and symbols unchanged

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🚀 Features

• Encrypt any text with a custom shift value
• Decrypt messages with the same shift value
• Interactive CLI menu for easy usage

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🖥️ Usage

1. Clone the repository

git clone https://github.com/HarshitPal25/Caesar-Cipher-encryption-and-decryption-tool.git
cd caesar-cipher-cli

python caesar_cipher.py

=== Caesar Cipher CLI Tool ===

Choose an option:

1. Encrypt a message
2. Decrypt a message
3. Exit Enter choice (1/2/3): 1

Enter message to encrypt: Hello World Enter shift value: 3

🔒 Encrypted message: Khoor Zruog

Choose an option:

1. Encrypt a message
2. Decrypt a message
3. Exit Enter choice (1/2/3): 2

Enter message to decrypt: Khoor Zruog Enter shift value: 3

🔓 Decrypted message: Hello World