Learn String Manipulation by Building a Cipher - Step 68

Python
1

Tell us what’s happening:

I understand I need to third parameter called direction. But what do I add to the parameter?

Your code so far


# User Editable Region

text = 'Hello Zaira'
custom_key = 'python'

def vigenere(message, key):
    key_index = 0
    alphabet = 'abcdefghijklmnopqrstuvwxyz'
    encrypted_text = ''

    for char in message.lower():
    
        # Append space to the message
        if char == ' ':
            encrypted_text += char
        else:        
            # Find the right key character to encode
            key_char = key[key_index % len(key)]
            key_index += 1

            # Define the offset and the encrypted letter
            offset = alphabet.index(key_char)
            index = alphabet.find(char)
            new_index = (index + offset) % len(alphabet)
            encrypted_text += alphabet[new_index]
    return encrypted_text

#encryption = vigenere(text, custom_key)
#print(encryption)

# User Editable Region

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Challenge Information:

Learn String Manipulation by Building a Cipher - Step 68

2

Your function currently has two parameters, message and key. All you need to do is add a third parameter (direction), alongside the other two.

3

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