Caesar_Cipher.py

def encrypt_caesar(plaintext, shift):
    encrypted_text = ""
    for char in plaintext:
        if char.isalpha():
            shifted = ord(char) + shift
            if char.islower():
                if shifted > ord('z'):
                    shifted -= 26
            elif char.isupper():
                if shifted > ord('Z'):
                    shifted -= 26
            encrypted_text += chr(shifted)
        else:
            encrypted_text += char
    return encrypted_text

def decrypt_caesar(ciphertext, shift):
    decrypted_text = ""
    for char in ciphertext:
        if char.isalpha():
            shifted = ord(char) - shift
            if char.islower():
                if shifted < ord('a'):
                    shifted += 26
            elif char.isupper():
                if shifted < ord('A'):
                    shifted += 26
            decrypted_text += chr(shifted)
        else:
            decrypted_text += char
    return decrypted_text

# Example usage:
plaintext = input("Enter your text ... ")
shift = int(input("Enter no of shifts ... "))
encrypted_text = encrypt_caesar(plaintext, shift)
print("Encrypted:", encrypted_text)
decrypted_text = decrypt_caesar(encrypted_text, shift)
print("Decrypted:", decrypted_text)