curriculum/challenges/english/blocks/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
Update your comments too. Your second comment should say encode/decode in place of encode. Your third comment should say encrypted/decrypted in place of encrypted.
Your second comment should be Find the right key character to encode/decode.
({ test: () => assert.match(code, /#\s*Find\sthe\sright\skey\scharacter\sto\sencode\/decode/) })
Your third comment should be Define the offset and the encrypted/decrypted letter.
({ test: () => assert.match(code, /#\s*Define\sthe\soffset\sand\sthe\sencrypted\/decrypted\sletter/) })
--fcc-editable-region--
text = 'Hello Zaira'
custom_key = 'python'
def vigenere(message, key, direction):
key_index = 0
alphabet = 'abcdefghijklmnopqrstuvwxyz'
final_message = ''
for char in message.lower():
# Append space to the message
if char == ' ':
final_message += 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*direction) % len(alphabet)
final_message += alphabet[new_index]
return final_message
encryption = vigenere(text, custom_key, 1)
print(encryption)
decryption = vigenere(encryption, custom_key, -1)
print(decryption)
--fcc-editable-region--