caesar-cipher/cipher_final.py at main · rkynhoff/caesar-cipher · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
#ENCRYPTION CODE
alphabet = "abcdefghijklmnopqrstuvwxyz"
new_message = ""

user_message = input("Enter your secret message: ").lower()
key = int(input("Enter a key (1 through 26): "))
#print(user_input)

for character in user_message:
    if character in alphabet:
        position = alphabet.find(character)
        new_position = (position + key) % 26
        new_character = alphabet[new_position]
        new_message += new_character

    else:
        new_message += character
print("Your secret message is " + new_message)

#DECRYPTION CODE
alphabet = "abcdefghijklmnopqrstuvwxyz"
new_message = ""

user_message = input("Enter your secret message: ").lower()
key = int(input("Enter a key (1 through 26): "))
#print(user_input)

for character in user_message:
    if character in alphabet:
        position = alphabet.find(character)
        new_position = (position - key) % 26
        new_character = alphabet[new_position]
        new_message += new_character

    else:
        new_message += character
print("Your secret message is " + new_message)

# I know I can define a function to improve the
# code and reduce the repetition, but each time I
# tried, the code nevr ran through all the input
# prompts. Only the initial input prompt would work.
# Any advice on how to get started with moving this
# into a function would be much apprecaited!