Caesar Cipher V1 & V2(advanced)

alphabet = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z']

direction = input("Type 'encode' to encrypt, type 'decode' to decrypt:\n")

text = input("Type your message:\n").lower()

shift = int(input("Type the shift number:\n"))

def encrypt(plain_text, shift_amount):

cipher_text = ""

for letter in plain_text:

position = alphabet.index(letter)

new_position = position + shift_amount

cipher_text += alphabet[new_position]

print(f"The encoded text is {cipher_text}")

def decrypt(cipher_text, shift_amount):

plain_text = ""

for letter in cipher_text:

position = alphabet.index(letter)

new_position = position - shift_amount

plain_text += alphabet[new_position]

print(f"The decoded text is {plain_text}")

if direction == "encode":

encrypt(plain_text=text, shift_amount=shift)

else:

decrypt(cipher_text=text, shift_amount=shift)

In this version, we try to merge the two functions into one which is called caesar!

alphabet = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z']

direction = input("Type 'encode' to encrypt, type 'decode' to decrypt:\n")

text = input("Type your message:\n").lower()

shift = int(input("Type the shift number:\n"))

def caesar(start_text, shift_amount, cipher_direction):

end_text = ""

if cipher_direction == "decode":

shift_amount *= -1

for letter in start_text:

position = alphabet.index(letter)

new_position = position + shift_amount

end_text += alphabet[new_position]

print(f"Here's the {direction}d result: {end_text}")

caesar(start_text=text, shift_amount=shift, cipher_direction=direction)